CHAPTER XVII.

PAPER AND PRINTING.

_Paper-making._--“The art preservative of all arts”--itself must have

means of preservation, and hence the art of paper-making precedes the

art of printing.

It was Pliny who wrote, at the beginning of the Christian era, that “All

the usages of civilised life depend in a remarkable degree upon the

employment of paper. At all events the remembrance of past events.”

Naturally to the Chinese, the Hindoo, and the Egyptian, we go with

inquiries as to origin, and find that as to both arts they were making

the most delicate paper from wood and vegetable fibres and printing with

great nicety, long before Europeans had even learned to use papyrus or

parchment, or had conceived the idea of type.

So far as we know the wasp alone preceded the ancient Orientals in the

making of paper. Its gray shingled house made in layers, worked up into

paper by a master hand from decayed wood, pulped, and glutinised,

waterproofed, with internal tiers of chambers, a fortress, a home, and

an airy habitation, is still beyond the power of human invention to

reproduce.

Papyrus--the paper of the Egyptians: Not only their paper, but its pith

one of their articles of food, and its outer portions material for

paper, boxes, baskets, boats, mats, medicines, cloths and other articles

of merchandise.

Once one of the fruits of the Nile, now no longer growing there. On its

fragile leaves were recorded and preserved the ancient literatures--the

records of dynasties--the songs of the Hebrew prophets--the early annals

of Greece and Rome--the vast, lost tomes of Alexandria. Those which were

fortunately preserved and transferred to more enduring forms now

constitute the greater part of all we have of the writings of those

departed ages.

In making paper from papyrus, the inner portion next to the pith was

separated into thin leaves; these were laid in two or more layers,

moistened and pressed together to form a leaf; two or more leaves united

at their edges if desired, or end to end, beaten smooth with a mallet,

polished with a piece of iron or shell, the ends, or sides, or both, of

the sheet sometimes neatly ornamented, and then rolled on a wooden

cylinder. The Romans and other ancient nations imported most of their

papyrus from Egypt, although raising it to considerable extent in their

own swamps.

In the seventh century, the Saracens conquered Egypt and carried back

therefrom, papyrus, and the knowledge of how to make paper from it to

Europe.

Parchment manufactured from the skins of young calves, kids, lambs,

sheep, and goats, was an early rival of papyrus, and was known and used

in Europe before papyrus was there introduced.

The softening of vegetable and woody fibre of various kinds, flax and

raw cotton and rags, and reducing it into pulp, drying, beating, and

rolling it into paper, seem to have been suggested to Europe by the

introduction of papyrus, for we learn of the first appearance of such

paper by the Arabians, Saracens, Spaniards and the French along through

the eighth, ninth, and tenth and eleventh centuries. Papyrus does not,

however, appear to have been superseded until the twelfth century.

Public documents are still extant written in the twelfth century on

paper made from flax and rags; and paper mills began to put in an

appearance in Germany in the fourteenth century, in which the fibre was

reduced to pulp by stampers. England began to make paper in the next

century. Pulping the fibre by softening it in water and beating the same

had then been practised for four centuries. Rollers in the mills for

rolling the pulp into sheets were introduced in the fifteenth century,

and paper makers began to distinguish their goods from those made by

others by water marks impressed in the pulp sheets. The jug and the pot

was one favourite water mark in that century, succeeded by a fool’s cap,

which name has since adhered to paper of a certain size, with or without

the cap. So far was the making of paper advanced in Europe that about

1640 wall paper began to be made as a substitute for tapestry; although

as to this fashion the Chinese were still ahead some indefinite number

of centuries.

Holland was far advanced in paper-making in the seventeenth century. The

revolution of 1688 having seriously interrupted the art in England, that

country imported paper from Holland during that period amounting to

£100,000. It was a native of Holland, Rittenhouse, who introduced

paper-making in America and erected a mill near Philadelphia in the

early years of the eighteenth century, and there made paper from linen

rags.

The Dutch also had substituted cylinders armed with blades in place of

stampers and used their windmills to run them. The Germans and French

experimented with wood and straw.

In the latter part of the eighteenth century some manufacturers in

Europe had learned to make white paper from white rags, and as good in

quality, and some think better, than is made at the present day. The

essentials of paper making by hand from rags and raw vegetable fibres,

the soaking of fibres in water and boiling them in lyes, the beating,

rolling, smoothing, sizing and polishing of the paper, were then known

and practised. But the best paper was then a dear commodity. The art of

bleaching coloured stock was unknown, and white paper was made alone

from stock that came white into the mill. The processes were nearly all

hand operations. “Beating” was pounding in a mortar. The pulp was laid

by hand upon moulds made of parallel strands of coarse brass wire; and

the making of the pulp by grinding wood and treating it chemically to

soften it was experimental.

The nineteenth century produced a revolution. It introduced the use of

modern machinery, and modern chemical processes, by which all known

varieties and sizes of paper, of all colours, as well as paper vessels,

are made daily in immense quantities in all civilised countries, from

all sorts of fibrous materials.

Knight, in his _Mechanical Dictionary_, gives a list of nearly 400

different materials for paper making that had been used or suggested,

for the most part within the century and up to twenty years ago, and the

number has since increased.

The modern revolution commenced in 1799, when Louis Robert, an employee

of François Didot of Essones, France, invented and patented the first

machine for making paper in a long, wide, continuous web. The French

government in 1800 granted him a reward of 8,000 francs. The machine was

then exhibited in England and there tested with success. It was there

that Messrs. Fourdrinier, a wealthy stationery firm, purchased the

patents, expended £60,000 for improvements on the machine, and first

gave to the world its practical benefits. This expenditure bankrupted

them, as the machines were not at once remunerative, and parliament

refused to grant them pecuniary assistance. Gamble, Donkin, Koops, the

Fourdriniers, Dickenson, and Wilkes, were the first inventors to improve

the Robert machine, and to give it that form which in many essential

features remains to-day. They, together with later inventors, gave to

the world a new system of paper making.

By 1872 two hundred and ninety-nine Fourdrinier machines were running in

the United States alone. In the improved Fourdrinier machine or system,

rags, or wood, or straw are ground or otherwise reduced to pulp, and

then the pulp, when properly soaked and drained, is dumped into a

regulating box, passing under a copper gate to regulate the amount and

depth of feed, then carried along through strainers, screeners or

dressers, to free the mass from clots and reduce it to the proper

fineness, over an endless wire apron, spread evenly over this apron by a

shaking motion, subjected to the action of a suction box by which the

water is drawn off by air-suction pumps, carried between cloth-covered

rollers which press and cohere it, carried on to a moving long felt

blanket to further free it from moisture, and which continues to hold

the sheet of pulp in form; then with the blanket through press rolls

adjustable to a desired pressure and provided with means to remove

therefrom adhering pulp and to arrest the progress of the paper if

necessary; then through another set of compression rollers, when the

condensed and matted pulp, now paper, is carried on to a second blanket,

passed through a series of steam cylinders, where the web is partially

dried, and again compressed, thence through another series of rollers

and drying cylinders, which still further dry and stretch it, and now,

finally completed, the sheet is wound on a receiving cylinder. The

number of rollers and cylinders and the position and the length of the

process to fully dry, compact, stretch and finish the sheet, may be, and

are, varied greatly. If it is desired to impress on or into the paper

water marks, letters, words, or ornamental matter, the paper in its

moist stage, after it passes through the suction boxes, is passed under

a “dandy” or fancy scrolled roll provided on its surface with the

desired design. When it is desired to give it a smooth, glossy surface,

the paper, after its completion, is passed through animal sizing

material, and then between drying and smoothing rollers. Or this sizing

may be applied to the pulp at the outset of the operation. Colouring

material, when desired, is applied to the pulp, before pressing. By the

use of machines under this system, a vast amount of material, cast-off

rags, etc., before regarded as waste, was utilised for paper making.

The modern discoveries of the chemists of the century as to the nature

of fibres, best modes and materials for reducing them to pulp, and

bleaching processes, have brought the art of paper making from wood and

other fibrous materials to its present high and prosperous condition.

What are known as the soda-pulp and the sulphite processes are examples

of this. The latter and other acid processes were not successful until

cement-lined digesters were invented to withstand their corroding

action. But now it is only necessary to have a convenient forest of

almost any kind of wood to justify the establishment of a paper mill.

It was the scarcity of rags, especially of linen rags, that forced

inventors to find other paper-producing materials.

It would be impossible and uninteresting in a work of this character to

enumerate the mechanical details constituting the improvements of the

century in paper-making machinery of all kinds. Thousands of patents

have been granted for such inventions. With one modern Fourdrinier

machine, and a few beating engines, a small paper mill will now turn out

daily as much paper as could be made by twelve mills a hundred years

ago.

In moulding pulp into articles of manufacture, satisfactory machines

have been invented, not only for the mere forming them into shape, but

for water-proofing and indurating the same. From the making of a

ponderous paper car wheel to a lady’s delicate work basket, success has

been attained.

_Paper bag machines_, machines for making _paper boxes_, applying and

staying corners of such boxes, for making _cell cases_ used in packing

eggs and fruit, and for wrapping fruit; machines for affixing various

forms of labels and addresses, are among the wonders of modern

inventions relating to paper. It is wonderful how art and ingenuity

united about thirty years ago to produce attractive _wall papers_.

Previous to that time they were dull and conventional in appearance. Now

beautiful designs are rolled out from machines.

_Printing._--We have already seen how paper making and printing grew up

together an indefinite number of centuries ago in the Far East. Both

block printing and movable types were the production of the Chinese,

with which on their little pages of many-coloured paper they printed

myriads of volumes of their strange literature in stranger characters

during centuries when Europeans were painfully inscribing their thoughts

with the stylus and crude pens upon papyrus and the dried skins of

animals.

But the European and his descendants delight to honour most the early

inventors of their own countries. Italy refers with pride to the

printing from blocks practised by the Venetians, and at Ravenna, from

1280 to 1300; from type at Subiaco in the Roman territory in 1465, and

to the first Roman book printed in 1470; the Dutch to Laurens Coster,

whom they allege invented movable type in 1423. Some of the Dutch have

doubted this, and pin their faith on Jacob Bellaert, as the first

printer, and Gerard Leeu, his workman, who made the types at Haarlem, in

1483. The Germans rely with confidence on John Guttenberg, who at

Strasburg, as early as 1436, had wooden blocks, and wooden movable

types, and who, two or three years after, printed several works; on the

partnership of Faust and Guttenberg in 1450 at Mentz, and their Bible in

Latin printed in 1456 on vellum with types imitating manuscript in form,

and illustrated by hand; and, finally, on Peter Schoeffer of Gernsheim,

who then made matrices in which were cast the letters singly, and who

thereby so pleased his master, Faust, that the latter gave him his

daughter, Christina, in marriage.

From Germany the art spread to Paris and thence to England. About 1474

Caxton was printing his black-letter books in England. Spain followed,

and it is stated that in 1500 there were two hundred printing offices in

Europe. The religious and political turmoils in Germany in the sixteenth

century gave an immense impetus to printing there. The printing press

was the handmaid of the Reformation. In America the first printing press

was set up in Mexico in 1536, and in Lima, Brazil, in 1586. In 1639,

nineteen years after the landing of the Pilgrims on the bleak rock at

Plymouth, they set up a printing press at Cambridge, Mass.

The art of printing soon resolved itself into two classes: first,

_composition_, the arranging of the type in the proper order into words

and pages; and second, _press work_; the taking of impressions from the

types, or from casts of types in plates--being a _facsimile_ of a type

bed. This was _stereotyping_--the invention of William Ged, of

Edinburgh, in 1731.

Types soon came to be made everywhere of uniform height; that of England

and America being 92-100 of an inch, and became universally classified

by names according to their sizes, as pica, small pica, long primer,

minion, nonpareil, etc.

After movable types came the invention of _Presses_. The earliest were

composed of a wooden frame on which were placed the simple screw and a

lever to force a plate down upon a sheet of paper placed on the bed of

type which had been set in the press, with a spring to automatically

raise the screw and plate after the delivery of the impression. This was

invented by Blaew of Amsterdam in 1620. Such, also, was the Ramage

press, and on such a one Benjamin Franklin worked at his trade as a

printer, both in America and in London. His London press, on which he

worked in 1725, was carried to the United States, and is now on

exhibition in Washington. This was substantially the state of the art at

the beginning of the century.

Then Earl Stanhope in England invented a press entirely of iron, and the

power consisted of the combination of a toggle joint and lever. The

first American improvement was invented by George Clymer, of

Philadelphia, in 1817, the power being an improved lever consisting of

three simple levers of the second order. This was superseded by the

“Washington” press invented by Samuel Rust in 1829. It has as essential

parts the toggle joint and lever, and in the frame work, as in the

Stanhope, type bed, rails on which the bed was moved in and out, means

to move the bed, the platen, the tympan on which the sheet is placed,

the frisket, a perforated sheet of paper, to preserve the printed sheet,

an inking roller and frame. In this was subsequently introduced an

automatic device for inking the roller, as it was moved back from over

the bed of type on to an inking table. This, substantially, has been the

hand press ever since.

With one of these hand-presses and the aid of two men about two hundred

and fifty sheets an hour could be printed on one side. The increase in

the circulation of newspapers before the opening of the 19th century

demanded greater rapidity of production and turned the attention of

inventors to the construction of power or machine presses. Like the

paper-making machine, the power press was conceived in the last decade

of the eighteenth century, and like that art was also not developed

until the nineteenth century. William Nicholson of England is believed

to have been the first inventor of a machine printing press. He obtained

an English patent for it in 1720. The type were to be placed on the face

of one cylinder, which was designed to be in gear, revolved with, and

press upon another cylinder covered with soft leather, the type cylinder

to be inked by a third cylinder to which the inking apparatus, was

applied, and the paper to be printed by being passed between the type

and the impression cylinder. These ideas were incorporated into the best

printing machines that have since been made. But the first successful

machine printing press was the invention of two Saxons, König and Bauer,

in 1813, who introduced their ideas from Germany, constructed the

machine in London, and on which on the 28th of November, 1814, an issue

of the _London Times_ was printed. The _Times_ announced to its readers

that day that they were for the first time perusing a paper printed upon

a machine driven by steam power. What a union of mighty forces was

heralded in this simple announcement! The union of the steam engine, the

printing press, and a great and powerful journal! An Archimedean lever

had been found at last with which to move the world.

The production of printed sheets per hour over the hand-press was at

once quadrupled, and very shortly 1800 sheets per hour were printed.

This machine was of that class known as cylinder presses. In this

machine ordinary type was used, and the type-form was flat and passed

beneath a large impression cylinder on which the paper was held by

tapes. The type-form was reciprocated beneath an inking apparatus and

the paper cylinder alternately. The inking apparatus consisted of a

series of rollers, to the first of which the ink was ejected from a

trough and distributed to the others. In 1815 Cowper patented in England

electrotype plates to be affixed to a cylinder. Applegath and Cowper

improved the König machine in the matter of the ink distributing

rollers, and in the adaptation of four printing cylinders to the

reciprocating type bed, whereby, with some other minor changes, 5000

impressions on one side were produced per hour. Again Applegath greatly

changed the arrangement of cylinders and multiplied their number, and

the number of the other parts, so that in 1848 the sheets printed on one

side were first 8000 and then 12,000 an hour.

In the United States, Daniel Treadwell of Boston invented the first

power printing machine in 1822. Two of these machines were at that time

set up in New York city. It was a flat bed press and was long used in

Washington in printing for the government. David Bruce of New York, in

1838, invented the first successful type-casting machine, which, when

shortly afterward it was perfected, became the model for type-casting

machines for Europe and America. Previous to that time type were

generally made by casting them in hand-moulds--the metal being poured in

with a spoon.

Robert Hoe, an English inventor, went to New York in 1803, and turned

his attention to the making of printing presses. His son, Richard March

Hoe, inherited his father’s inventive genius. While in England in

1837-1840, obtaining a patent on and introducing a circular saw, he

became interested in the printing presses of the London Times. Returning

home, he invented and perfected a rotary machine which received the name

of the “Lightning Press.” It first had four and then ten cylinders

arranged in a circle. As finally completed, it printed from a continuous

roll of paper several miles in length, and on both sides at the same

time, cutting off and folding ready for delivery, 15,000 to 20,000

newspapers an hour, the paper being drawn through the press at the rate

of 1,000 feet in a minute. Before it was in this final, completed shape,

it was adopted by the _London Times_. John Walter of London in the

meantime invented a machine of a similar class. He also used a sheet of

paper miles long. It was first damped, passed through blotting rolls,

and then to the printing cylinders. It gave out 11,000 perfected sheets,

or 22,000 impressions an hour, and as each sheet was printed, it was cut

by a knife on the cylinder, and the sheets piled on the paper boards. It

was adopted by the London _Times_ and the New York _Times_.

A German press at Augsburg, and the Campbell presses of the United

States, have also become celebrated as web perfecting presses, in which

the web is printed, the sheets cut, associated, folded, and delivered at

high speed. One of the latest quadruple stereotype perfecting presses

made by Hoe & Co. of New York has a running capacity of 48,000 papers

per hour. On another, a New York paper has turned off nearly six hundred

thousand copies in a single day, requiring for their printing

ninety-four tons of paper. Among other celebrated inventors of printing

presses in the United States were Isaac Adams, Taylor, Gordon, Potter,

Hawkins, Bullock, Cottrell, Campbell, Babcock, and Firm.

_Mail-marking Machines_, in which provision is made for holding the

printing mechanism out of operative position in case a letter is not in

position to be stamped; address-printing machines, including machines

for printing addresses by means of a stencil; machines for automatically

setting and distributing the type, including those in which the

individual types are caused to enter the proper receptacle by means of

nicks in the type, which engage corresponding projections on a

stationary guard plate, and automatic type justifying machines. All such

have been invented, developed, and perfected in the last half century.

Another invention which has added wonderfully to push the century along,

is the _Typewriter_. It has long been said that “The pen is mightier

than the sword,” but from present indications, it is proper to add that

the typewriter is mightier than the pen.

A machine in which movable types are caused to yield impressions on

paper to form letters by means of key levers operated by hand, has been

one of slow growth from its conception to its present practical and

successful form.

Some one suggested the idea in England in a patent in 1714. The idea

rested until 1840, when a French inventor revived it in a patent. At the

same time patents began to come out in England and the United States;

and about forty patents in each of these two countries were granted from

that time until 1875. Since that date about 1400 patents more have been

issued in the United States, and a large number in other countries. It

was, however, only that year and before 1880, that the first popular

commercially successful machines were made and introduced.

The leading generic idea of all subsequent successful devices of this

kind was clearly set forth in the patent of S. W. Francis of the United

States in 1857. This feature is the arranging of a row of hammers in a

circle so that when put in motion they will all strike the same place,

which is the centre of that circle. The arrangement of a row of pivoted

hammers or type levers, each operated by a separate key lever to strike

an inked ribbon in front of a sheet of paper, means to automatically

move the carriage carrying the paper roll from right to left as the

letters are successfully printed, leaving a space between each letter

and word, and sounding a signal when the end of a line is reached, so

that the carriage may be returned to its former position--all these and

some other minor but necessary operations may seem simple enough when

stated, but their accomplishment required the careful study of many

inventors for years.

One of the most modern of typewriters has a single electro-magnet to

actuate all the type bars of a set, and to throw each type from its

normal position to the printing centre. By an extremely light touch

given to each key lever the circuit is closed and causes the lever to

strike without the necessity of pressing the key down its whole extent

and releasing it before the next key strikes. By this device, the

operator is relieved of fatigue, as his fingers may glide quickly from

one key to another, the printing is made uniform, and far greater speed

attained by reason of the quick and delicate action. Mr. Thaddeus Cahill

of Washington appears to be the first to have invented the most

successful of this type of machines.

_Book-binding Machinery_ is another new production of the century. It

may be that the old hand methods would give to a book a stronger binding

than is found on most books to-day, but the modern public demands and

has obtained machinery that will take the loose sheets and bind them

ready for delivery, at the rate of ten or fifteen thousand volumes a

day.

The “quaint and curious volumes of forgotten lore,” the Latin folios in

oak or ivory boards with brass clasps, or bound in velvet, or in crimson

satin, ornamented with finest needlework or precious stones, or the more

humble beech boards, and calf and sheep skins with metal edges and iron

clasps, in all of which the sheets were stoutly sewed together and

glued, when glue was known, to the covers, are now but relics of the

past. Machinery came to the front quite rapidly after 1825, at which

time cloth had been introduced as cheaper than leather, and as cheap and

a more enduring binder than paper. The processes in book-binding are

enumerated as follows; and for each process a machine has been invented

within the last sixty years to do the work:

Folding the sheets;

Gathering the consecutive sheets;

Rolling the backs of folded sheets;

Saw cutting the backs for the combs;

Sewing;

Rounding the back of the sewed sheets.

Edge cutting;

Binding, securing the books to the sides, covering with muslin,

leather or paper. Tooling and lettering.

Edge gilting.

One of the best modern illustrations of human thought and complicated

manual operations contained in automatic machinery is the _Linotype_.

It is a great step from the humble invention of Schoeffer five hundred

and fifty years ago of cast movable type to that of another German,

Mergenthaler, in 1890-92.

The Linotype (a line of type) was pronounced by the _London Engineering_

“as the most remarkable machine of this century.” It was the outcome of

twelve years of continuous experiment and invention, and the expenditure

of more than a million dollars. A brief description of this invention is

given in the report of the United States commissioner of patents for

1895 as follows: “In the present Mergenthaler construction there is a

magazine containing a series of tubes for the letter or character

moulds, each of which moulds is provided with a single character. There

are a number of duplicates of each character, and the moulds containing

the same character are all arranged in one tube. The machine is provided

with a series of finger keys, which, when pressed like the keys of a

typewriter, cause the letter moulds to assemble in a line in their

proper order for print. A line mould and a melting pot are then brought

into proper relation to the assembled line of letter moulds and a cast

is taken, called the linotype, which represents the entire line, a

column wide, of the matter to be printed. The letter moulds are then

automatically returned to their proper magazine tube. The Mergenthaler

machine is largely in use in the principal newspaper offices, with the

result that a single operator does at least the work of four average

compositors.”

Mr Rogers obtained a United States patent, September 23, 1890, for a

machine for casting lines of type, the principal feature of which is

that the letter moulds are strung on wires secured on a hinged frame.

“When the frame is in one position, the letter moulds are released by

the keys, slide down the wires by gravity and are assembled in line at

the casting point. After the cast is taken, the lower ends of the guide

wires are elevated, which causes the letter moulds to slide back on the

wires to their original position, when the operation is repeated for the

next line.” Operated by a single person, the Mergenthaler produces and

assembles linotypes ready for the press or stereotyping table at the

rate of from 3,600 to 7,000 ems (type characters) per hour. It permits

the face or style of type to be changed at will and it permits the

operator to read and correct his matter as he proceeds.

To the aid of the ordinary printing press came _electrotyping_,

stenographic colour printing, engraving, and smaller job and card

presses, all entirely new creations within the century, and of infinite

variety, each in itself forming a new class in typographic art, and a

valuable addition to the marvellous transformation.

The introduction of the linotype and other modern machines into printing

offices has without doubt many times reduced and displaced manual

labour, and caused at those times at least temporary suffering among

employees. But statistics do not show that as a whole there are fewer

printers in the land. On the contrary, the force seems to increase, just

as the number of printing establishments increase, with the

multiplication of new inventions. As in other arts, the distress caused

by the displacement of hand-labour by machinery is local and temporary.

The whole art rests for its development on the demand for reading

matter, and the demand never seems to let up. It increases as fast as

the means of the consumers increase for procuring it. One hundred years

ago a decent private library, consisting of a hundred or so volumes, one

or two weekly newspapers, and an occasional periodical, was the badge

and possession alone of the wealthy few. Now nearly every reading

citizen of every village has piled up in some corner of his house a

better supply than that, of bound or unbound literature, and of a far

superior quality. Besides the tons of reading matter of all kinds turned

out daily by the city presses, every village wants its own paper and its

town library, and every one of its business men has recourse to the

typewriter and the printer for his letters, his cards, and his

advertisements.

To supply the present demand for printed matter with the implements of a

hundred years ago, it would be necessary to draw upon and exhaust the

supply of labourers in nearly every other occupation. Printing would

become the one universal profession.

The roar of the guns at Waterloo and the click of the first power

printing press in London were nearly simultaneous. The military Colossus

then tumbled, and the Press began to lead mankind. Wars still continue,

and will, until men are civilised; but the vanguard of civilisation are

the printers, and not the warriors. The marvellous glory of the

nineteenth century has proceeded from the intelligence of the people,

awakened, stimulated, and guided by the press. But the press itself, and

its servitors and messengers, speeding on the wings of electricity, are

the children of the inventors.

These inventions have made the book and the newspaper the poor man’s

University. They are mirrors which throw into his humble home

reflections of the scenes of busy life everywhere. By them knowledge is

spread, thought aroused, and universal education established.

Inventions in the century · 第 17 / 31 章