In Foster’s travels, too, Mary shewed me a description of the city of

Kashmire, where the houses though slightly built, have flat roofs of

sufficient strength to support a covering of earth; this is planted with

roses and other flowers, and gives the town a very beautiful

appearance. The earth also preserves the houses from being chilled by

the quantity of snow that lies on them in winter; and in summer it gives

them a refreshing coolness. Every creature he met had roses in their

hands; and you may recollect, mamma, that the same thing is said of the

city of Bisnagar in the Arabian Night’s tales. The province of Kashmire,

Foster says, has been always famous for roses, particularly for one

extremely fragrant species, of which the best attar of rose is made; but

it will not grow in a more southerly climate.

He mentions a lake, near the city, in which there were several islands

covered with rose-trees; they were all in brilliant blossom when he was

there, and looked like large baskets of roses. How pretty the floating

Chinampas of Mexico would be if they were planted with the Kashmire

rose; or, what would suit them better, with the little rose of Jericho.

Miss P. says this is one of the most singular plants in the world, and

is found no where but in the deserts of Arabia. It is only six inches

high, root and all; and its tiny branches curve inward, so as to enclose

its numerous flowers in a sort of hollow globe. I think this may be

truly called a Lilliputian tree.

_14th, Sunday._--The thirty-second chapter of Deuteronomy, or the song

of Moses, was the subject of our conversation this morning. My uncle

told us that it consists of six parts.

“It opens in the first five verses with a summons to the whole universe

to listen to the inspired voice of the prophet; and contrasts the power,

truth, and justice of God with the iniquities of the ‘perverse

generation’ whom he was addressing. In the next nine verses he

expatiates on God’s continued indulgence and more than fatherly

affection towards the Israelites; he makes an affecting appeal to their

gratitude; and he dwells on the unceasing protection they had

experienced from their first helpless origin, up to their entrance into

the rich land of promise, in a manner which shows that Moses spoke from

a full recollection of the scenes he had witnessed, and that he deeply

felt the extent of the almighty power and goodness.

“In the expression ‘When the most High divided to the nations their

inheritance,’ we are to understand the tribes of Israel; each of which,

from their extraordinary increase of population, might be considered as

a nation in itself, while the whole composed ‘His people,’ the most

highly favoured of all the nations of the earth.”

I begged of my uncle to explain what was meant in the 13th verse by “He

made them ride on the high places of the earth;” and afterwards by

“sucking honey and oil out of the flinty rock?” He answered, “The former

phrase applies to the victories which the Israelites had already

achieved through the divine assistance, as well as to the final conquest

of the land of Canaan by the same means. The honey and oil are allusions

to the fruitfulness of the country, which abounds with wild bees, who

build their honeycombs in the rocks; and with the finest olive trees,

which it is well known strike their roots into the rocky crevices.

“The third part of the song,” he continued, “begins with the fifteenth

verse, and describes the usual effect of prosperity upon a thoughtless

and ungrateful people. ‘But Jeshurun waxed fat and kicked.’ This figure

of speech is probably taken from a pampered horse, who becomes

unmanageable and vicious; and you will find it repeated in Hosea[4].

‘According to their pasture they were filled, and their heart was

exalted; therefore they have forgotten me.’ Jeshurun is derived from a

word signifying upright, and is put here, as well as in Isaiah, for

Israel. It would not be very difficult to apply the whole of this

passage to more modern nations, who have far less excuse than even the

Israelites for ‘forsaking God, and lightly esteeming the rock of their

salvation;’ but, as individuals, at least, we may take a useful lesson

from it; let us beware of the seductions of prosperity, lest our hearts

become too much engrossed by the happiness that we enjoy, or too much

depressed by the salutary disappointments that we sometimes undergo.

“The fourth part, from the nineteenth verse to the end of the

twenty-fifth, expresses the indignation of the Lord, and his threats of

rejecting apostate Israel, and of adopting in their room the believing

Gentiles. It is quoted by St. Paul, as having that interpretation; and I

will only further remark, that it is written with the most awful

strength that language can supply; and that all its denunciations have

been literally accomplished.

“The fifth division, to the end of verse 35, states the wise and

gracious reasons of the dispersion of the Jews into all lands, both for

their ultimate preservation, and to prevent their enemies from vainly

ascribing to themselves their destruction. It was not indeed from any

merit of their own that those enemies were allowed to triumph, they were

only employed as the instruments of punishment; and God declares in the

sequel that they will have to answer for their own corruptions and

idolatries in the day of vengeance.

“‘For their rock is not as our Rock; even our enemies themselves being

judges.’ This remarkable passage was evidently introduced by Moses in a

parenthesis. He prophetically knew that their conquerors would often

have to confess the superiority of the God of Israel over their own

deities; and accordingly many examples of it may be collected in

Scripture. I need scarcely remind you of Nebuchadnezzar’s decree, when

he perceived the three faithful Jews escaping unhurt from his fiery

furnace[5]; nor of his touching acknowledgment of the one true God when

he regained his reason[6]; and in profane history you no doubt recollect

the declaration of the Roman emperor Titus, after the conquest of

Jerusalem,--That he was only an instrument in the hand of God, whose

wrath had been so signally manifested against the Jews.

“The last part of this celebrated song is called the consolation of

Israel: it holds out a gracious promise of future reconciliation when

they should have repented of their obstinacy, and abjured the vain idols

in whom they had trusted for protection; it gives an awful warning to

their oppressors, that the day of account and of vengeance for them also

will come; and the words in the concluding verse, ‘Rejoice, O ye nations

with his people,’ seem to have been cited by St. Paul,[7] to prove the

future conversion of both Jews and Gentiles to Christ, and their mutual

exultation in his then undivided kingdom.”

_15th._--I seized an opportunity of asking my uncle some questions about

the beds of coal in the forest of Dean, and I learned that the coal

formation there, is an irregular elliptical basin, occupying nearly the

whole of the forest tract. It is ten miles long, and six broad; and all

the strata dip uniformly to the centre of the basin. He shewed me the

extent of it on a geological map, which he has made of this county; and

which marks in the prettiest manner all the principal strata. Each kind

of rock has a particular colour, so that its extent is seen at a glance;

and by a section at the bottom of the map, the dip or inclination of the

strata, and the manner in which they lie on each other, are very

distinctly shewn. He made Caroline and me observe that we could trace on

it the mountain-lime and old red-sandstone (which enclose the

coal-field) across the river Wye into South-Wales: there, he says, they

contain another coal district, of much greater extent; and he showed it

to us in Mr. Greenough’s beautiful geological map of all England. I

should never have been tired of looking at these maps, if Caroline, who

knew how little time my uncle could spare, had not asked him something

about the origin of coal.

“Before I answer that question,” said he, “we must have a little

discussion on the nature of _peat_; a substance which seems to be very

closely allied to coal, and which, there is no doubt, has been produced

by the decay and decomposition of vegetable matter. There are different

kinds of peat, therefore, according to the different kinds of plants of

which it is composed, and the different situations in which the process

has been carried on; such as marsh, forest, and marine peat. Some

extensive bogs have been caused within the memory of man, by the decay

and natural fall of forests, over which the _sphagnum palustre_ and

other mosses rapidly spread; agricultural implements and various

domestic utensils have been found under them; and we may therefore

assume, that as peat appears to be in the act of progressive increase,

it belongs to an order of causes still in action. When examined, peat

appears to be an entire mass of vegetable _fibres_: towards the surface

they are nearly in an unchanged state, but in the middle the peat

becomes more compact; and at the bottom of a very deep and ancient bog,

they are almost obliterated, the substance being dense and black, and

having all the chemical characters of jet. In some instances beds of

peat alternate with beds of mud or sand, which must have been deposited

in the bottom of lakes, and in these cases they appear something like an

incomplete coal formation.

“In a short time,” continued my uncle, “we shall have a better

opportunity of studying this curious substance, if your interest in it

continues, when we are in Ireland, as that island contains a greater

proportion of bog than any country with which we are acquainted.”

“My interest in it, my dear uncle, I replied, is not very likely to fail

while I have your kind assistance; but as we are as yet in a coal

country, perhaps you will tell us something of the formation or origin

of that mineral.”

“There is no possible doubt,” he said, “that the general origin of coal

must be referred to the vegetable kingdom; and I began with peat, to

show you how masses of vegetable matter may be collected in thick and

very extensive beds, ready for whatever process nature may afterwards

employ in converting them into coal. Some species of coal are merely

fossil wood (or lignite) impregnated with bitumen: the branches, trunks,

and roots, though closely pressed together, are scarcely altered in

texture, in some places; while in others they gradually lose every

vegetable feature, and the substance in colour, lustre, and fracture,

resembles pitch. Of this nature is the Bovey coal of Devonshire, and the

Surturbrand of Iceland; and I have some specimens of the former, in

which the fibres were flexible when I took them out of the pit, though

now hard and brittle. From the disposition of those Bovey lignites,

which lie in alternate strata with clay and gravel, it has been

reasonably inferred that the trees and vegetables of the adjacent

mountains were washed down at different periods into a lake; the clay

and gravel, of course, sank first to the bottom, and formed the floor;

but in time the trees saturated with moisture, and pressed down by an

accumulation of other trees, sank also; and were again, perhaps in

succeeding ages, covered by successive depositions.

“The common, or cubical coal, as it is called from the shape into which

it breaks, does not bear the same obvious marks of vegetable origin in

its structure; but where one species of coal can be so clearly

demonstrated to be only altered vegetable matter, it would be bad

philosophy to ascribe the other species to other causes. In the

prodigious beds of coal, however, in Staffordshire, there is no want of

vegetable traces; and even in the Newcastle coal the impressions of

leaves and branches are frequently found, as well as in the freestone

and slate-clay which intervene between its numerous strata. At Kilsyth,

in Scotland, a very singular specimen was discovered; a tree standing

upright, with its roots resting on a bed of coal, from which they could

scarcely be distinguished, and its stem passing into a stratum of

sandstone rock. The lower end was completely bituminated, and it burned

with a clear flame; yet the upper part, though scarcely altered in the

grain or apparent texture of the wood, was converted into sandstone

similar to that by which it was enclosed. Round the stem there was a

space of about an inch in thickness filled with coal, which renders it

probable that the same process that converted the roots into coal acted

upwards on the bark. The rock contains innumerable remains of plants;

some of which are so perfect that their species have been made out, and

no pencil could trace their delicate ramifications with greater nicety.

“In short,” continued my uncle, “it appears more than probable that

every species of coal has proceeded from vegetable matter of different

kinds, but under different circumstances; and that its chemical change

was effected under the pressure of deep water. In one stage of that

process it must have been in a soft pulpy state, like the lowest part of

a deep peat-bog; for this is the only way that I can account for the

impression of leaves, canes, seed-vessels, and shells, which are so

commonly found on the external surface of coal.”

My uncle shewed us a beautiful specimen of a fern leaf, where the

impression was as perfect as if it had been made with wax.

He then continued, “Sir James Hall thinks that peat may have been

converted into coal by heat acting under great compression; and he has

actually succeeded in making a substance very like it. When I have more

leisure I will describe the ingenious process which he adopted, as well

as some other experiments of the same nature, by which this

distinguished philosopher discovered the means of fusing limestone, of

imitating volcanic lava, and of forming solid sandstone from loose sand.

“But to return to our coals: the chief difference between the various

kinds of coal which are applied to economical purposes, arises from the

proportion of bitumen they contain. What is called _caking coal_ yields

about 40 per cent.; when burning it swells, agglutinates, and emits much

smoke and gas, which inflame at a certain temperature. _Cannel_ coal has

only 20 per cent. of bitumen, and does not agglutinate or cake. It burns

with a bright flame like a candle, from which circumstance it takes its

name, cannel being the common pronunciation of candle in the North of

England. The third sort I shall mention is called _anthracite_ by

mineralogists; but its common name is _blind_ coal, or Kilkenny coal,

from a district in Ireland, where there are vast beds of it. It contains

little or no bitumen; it neither cakes nor flames, and gives out very

little smoke. But as there are several varieties of coal between those

principal species, much confusion has taken place in their names.”

_16th._--When Mary and I were in the garden to-day, I observed a very

odd appearance on the under surface of some of the leaves of a

pear-tree; they appeared thickly set with strange little downy

russet-coloured things like spines growing out of the leaf,

perpendicular to it, and about a quarter of an inch in length, and very

little thicker than a pin, with a protuberance or excrescence at the

base.

Mary was amused at my surprise, and told me that they were the

habitations of insects. She then took one of these tubes off the leaf,

and on giving it a gentle squeeze, a minute caterpillar, with a

yellowish body and black head, came out of the lower end; for the head

is always downwards. We examined the place from which she had removed

it, and I saw that there was a small hollow in the outer skin and pulpy

part of the leaf, which had been eaten away by the caterpillar. It moves

this little tube or tent from one part of the leaf to the other, and

eats no other part than what the tent covers; and when these insects are

abundant, Mary says that every leaf is covered with little withered

specks, where they have feasted themselves.

The tube in which the caterpillar lives, is composed of silk, spun from

its mouth almost as soon as it comes out of the egg, and as it increases

in size it enlarges the tube, by slitting it in two, and introducing a

strip of new materials. To preserve the perpendicular posture of its

tent, this ingenious insect attaches several silken threads from the

protuberance at the base to the surface of the leaf; but it has a still

more singular device to protect the tent against any violence: it forms

a vacuum in the protuberance at the base, which fastens it to the leaf

as effectually as if an air-pump had been employed. This vacuum is

caused by the insect’s retreating on the least alarm up the tube, which

its body so completely fills that the space below is free of air, and

the tube is pressed down like the exhausted receiver of an air-pump.

Mary easily convinced me of this when she seized it suddenly while the

insect was at the bottom, the silken cords readily gave way, and the

tube was detached by a very slight force; but when she touched it

gently, giving the insect time to retreat, we found that a much stronger

effort was required to loosen it. As if aware of the effect of the

admission of air from below, this little philosopher carefully avoids

gnawing quite through the leaf; and when he has eaten as deeply as he

can venture, he cuts the cords of his tent and pitches it on a fresh

part of the surface. When it has attained its perfect state, it becomes

a small brown moth.

_17th._-Mary has been trying a grand experiment, which has succeeded so

well that mamma must have an account of it.

My uncle determined to remove a valuable jargonelle pear-tree from one

wall to another. I forget his reason, but no matter; it was, however,

much too late in the season, and the tree sickened, and seemed to be

dying. The gardener declared it could not live; but Mary, who had read

that trees in such a predicament might be saved by a gentle but

continual drip of water being guided to the roots, requested my uncle to

let her try the effect of this plan. He is always anxious to encourage

useful experiment, and willingly consigned the tree to her

prescriptions.

She took two large flower-pots, and, having carefully corked the holes,

she suspended one to each end of a stick, which was fastened across the

stem of the tree. A piece of cloth-listing or selvage, long enough to

reach the ground, was put into each pot, with a stone tied to it to

prevent its slipping out; and the other end of the listing was slit into

three parts, which were slightly pegged into the ground. She then had

the pots filled with water, and the whole of the listing being wetted,

each of them acted like a syphon, drawing the water up over the edge of

the pot, as my uncle says by capillary action, and conducting it slowly

and regularly into the ground. The moisture spread to the roots, and in

three days the young leaves began to revive. The pots were filled every

morning, and she changed the listing once a week, as the filaments of

the cloth became clogged, and the water was not so freely transmitted.

The daily improvement of the tree was very gratifying to my uncle, who

enjoyed Mary’s ingenuity and success; and even the gardener has this

morning pronounced it to be out of danger.

_18th._--I am afraid that my dear mamma will call me a little credulous

simpleton when she reads this account of the singular sagacity of a cat;

but my aunt took great pains to ascertain that it was quite correct.

Dame Moreland has some remarkably fine cats, and she is in the constant

habit of drowning all their progeny, except one kitten of her favourite,

Mrs. Snowtip’s, which she selects with due attention to its beauty. This

time, however, pussy thought proper to choose that one for herself, and

carrying it from the garden into the house, she left the rest to perish.

Accustomed to their being regularly taken away, she seemed to agree to

that arrangement, and devoted herself to the one she had saved.

A few weeks afterwards another of the cats kittened, and its whole brood

being destroyed, the poor thing became very uneasy, and suffered much

from the want of her little ones to relieve her of the nourishment

provided for them. On which, the fat Mrs. Snowtip being very

ill-supplied herself, actually employed the poor bereaved cat as a

nurse. This office she performs with proper fidelity, and the two ladies

agree perfectly; for while the nurse feeds little Snowtip, the mother

smooths and dresses it herself, and on any alarm flies to its

protection, while the nurse seems contented with doing her own duty, and

never interferes on such occasions.

_19th._--I have had a good deal of work at my strawberry bank, for Mr.

Biggs warned me that the beds ought never to be dug, but constantly

hand-weeded; and he recommended also that the runners should be nipped

off as soon as they appeared. I undertook to do all this myself; and

both weeds and runners seem determined that I shall not be idle.

This strawberry bank is such a very dry soil, that I found the plants

wanted water continually; and I asked my uncle to let a little channel

be made, for the purpose of bringing to the top of the bank a small rill

that runs across the back of the shrubbery. Something I had heard about

_irrigating_ meadows suggested this idea, and my uncle approved. The

channel has been cut, and it brings the water on a level along the upper

edge of my bank, from whence it trickles down the slope along each row

of strawberry plants. When they have had enough, I put a slate edgeways

across the channel, which acts as a little sluice, and turns the water

aside into the pond. This method of watering has so far answered very

well, for I think my strawberries look more healthy than any of the

others; they are now in full flower, and I am in high hopes of having

the first and best fruit to present to my uncle for his kindness.

_20th._--I had a long walk yesterday evening with Miss Perceval and Mary

through some of farmer Moreland’s fields, which are shut up for meadow.

The grasses are opening their blossoms, and Miss Perceval taught me the

names of several that I had not known. She then asked me if I could

describe the leading characters of the grass family.

I considered, and hesitated, and tried; but my attempts were very

awkward, and I acknowledged that trials of that sort were sometimes

exceedingly useful in making us acquainted with our own ignorance. She

smiled, and put the same question to Mary.

Mary said, “I will do my best, but on condition that you will tell me

where I am wrong. The stem is generally smooth, and its hollow

cylindrical form enables it to stand upright even when four or five feet

high; it is usually jointed, which gives it additional strength; and it

is terminated by the flowers, which are either tufted, or in spikes, or

panicled:--the leaves are alternate, and always undivided--one of them

springing from each knot, and enveloping the stem with a sheath, which

is split down to the knot. All grasses have a chaffy flower inclosed in

a glume or husk; and each flower has a single seed. These are all the

general characters that I can recollect, which mark the tribe

distinctly.”

“Very clear, indeed,” said Miss Perceval, “and quite full enough. The

grasses are easily distinguishable from all other plants, except the

Cyperacea; and even they shew a well-marked line of separation, as their

stems are sometimes triangular, and very seldom jointed; and the sheath

is always entire, not split like that of the grasses.

“The grasses are of the greatest importance,” she continued, “in the

economy of nature; they form in most countries the chief covering of

the earth; they are the principal support of terrestrial animals; and

you know that the basis of all agriculture is the cultivation of plants

which belong to their order.”

Miss P. easily allows herself to be drawn out, and before we reached

home, we obtained the following particulars of that numerous family.

“There are about eighteen hundred species already known; and the

industry of botanists is every day adding to the list: there are both

land and fresh-water grasses, but no marine grass. They occur in every

soil; generally in society with other grasses, but sometimes a single

species will be found occupying a considerable district. Sand appears

the least favourable to their growth; but even sand has species peculiar

to itself. They are spread over the whole vegetable kingdom, from the

equator to the polar regions; and from the sea-shores to the tops of the

highest mountains, at least to the line of perpetual congelation.

Bertha's Visit to Her Uncle in England; vol. 3 [of 3] · 第 6 / 13 段