dividing lines or transferring divisions on paper. An
instrument for describing circles from four to six inches
radius, or to the utmost conceivable distance--Gunners
callipers--Gunners levels or perpendiculars--Shot
gauges--Shell ditto--Gunners quadrants, with a plummet or
level, or adjusting screw, &c. and all other instruments
for military purposes.
HADLEY’S QUADRANTS, mahogany, the divisions on wood 1 11 6
Ditto mahogany with ivory arch and nonius, double
observation 2 2 0
Ditto, ditto, a brass index, double observation 2 12 6
Ditto, ebony and brass, best glasses, engine divided, &c. 3 0 0
Ebony and brass mounted best sextants, from 4l. 4s. to 8 18 6
Metal ditto, all brass, framed on a principle the least
liable to be warped or strained, with adjusting screws,
telescopes, and other auxiliary apparatus, the most
proper for taking distances accurately, to determine the
longitude at sea, &c. 12 12 0
Ditto, second best 8 8 0
A new small 3-inch pocket box sextant to take angles to a
minute, from 2l. 2s. to 3 3 0
Artificial horizons, by parallel glasses and quicksilver,
to take double altitudes by 1 16 0
Gunter’s quadrant, from 4s. to 1 1 0
Azimuth compasses of different constructions, from 5l.
5s. to 12 12 0
Pocket compasses from 2s. 6d. to 5 5 0
Horizontal sun-dials, in brass, made for any latitude, of
four, five, or six inches diameter, divided into five
minutes of time, each at 6s. 9s. and 0 12 0
Ditto seven inches 0 16 0
Ditto eight inches, into two minutes 1 4 0
Ditto ten inches, ditto 1 16 0
Ditto twelve inches, ditto 2 10 0
Ditto, fifteen inches, into every minute, thirty-two
points of the compass, &c. 4 14 6
Ditto eighteen inches, ditto, ditto, with equation table,
&c. 8 8 0
Ditto 2 feet diameter, ditto, ditto 15 15 0
A new universal ditto and equatorial, making a very
portable angular instrument, from 8l. 8s. to 31 10 0
Universal ring dials, from 7s. 6d. to 10 10 0
_For a general description and representation of the instruments used
in surveying, levelling, and other branches of practical geometry, see
the late Mr._ G. ADAMS’S Geometrical and Graphical Essays, _an
improved edition by_ W. JONES, _in two vols, 8vo. 1797, with
thirty-five folio copper-plates. Price 14s._
ASTRONOMICAL, &c. INSTRUMENTS.
A portable TRANSIT INSTRUMENT, with a cast iron stand,
to ascertain the rate of chronometers, the longitude, &c.
the axis is twelve inches in length, and the telescope
about twenty inches, packed in a case 12 12 0
Ditto, with a brass framed stand, and other additions 20 0 0
Transit instruments of larger dimensions made to order.
The new CIRCULAR INSTRUMENTS and EQUATORIALS, from 63l.
to 180 0 0
Planetariums, shewing the phænomena of the Ptolemaic and
Copernican systems, from 7l. 7s. to 50 0 0
Manual orreries of the common construction from 2l. 12s.
6d. to 6 6 0
Jones’s (Wm.) new portable orrery, the tellurian part 1 1 0
Ditto, the planetarium part 1 1 0
Tellurian and planetarium together, making the _New
Portable Orrery_, packed in a neat mahogany box,
according to the sizes, from 2l. 12s. 6d. to 5 5 0
An orrery shewing the motions of Mercury, Venus, the
Earth and Moon, by wheel-work, the Earth is a 1¹⁄₂ inch
globe, packed in a box 4 4 0
Other planetariums and orreries in great variety, the
motions by wheel-work, exemplifying all the motions and
phænomena of all the planets, the Georgium Sidus
included, from 40l. to 1000 0 0
Cometariums, for exemplifying the motion of comets,
from 1l. 11s. 6d. to 5 5 0
Senex’s globes improved, twenty-eight inches diameter,
mahogany frames, from 25l. to 50 0 0
Twelve inch ditto, improved by Ferguson, with all the
new discoveries of Capt. Cooke, &c. with the new hour
circles, which supersede all the intended advantages of
cumbersome wires, and other appendages, in other globes,
mounted in neat mahogany claw-feet frames 5 5 0
Ditto, in common coloured wood frames 3 3 0
Additional price of a compass, and fitting to both globes 0 5 0
A pair of red leather covers for the globes 0 9 6
Globes, nine inches diameter, with the new discoveries 2 2 0
Ditto, three inches ditto, in claw-feet, mahogany frames 1 10 0
Ditto, three inches single, one in a case for the pocket 0 9 0
Geographical planispheres, to solve problems, mounted as
a hand fire-screen 0 7 6
A brass armillary sphere, three inches diameter 3 3 0
A six inch ditto 6 6 0
A nine inch ditto 9 9 0
A twelve inch ditto 12 12 0
Larger ditto, with planetarium, from 21l. to 105 0 0
_For a general description of orreries and other astronomical
instruments, see the late Mr._ G. ADAMS’S Astronomical Essays, _8vo.
with sixteen plates; price 10s. 6d. now sold by_ W. _and_ S. JONES.
PHILOSOPHICAL, &c. INSTRUMENTS.
A single-barrel AIR PUMP, with receiver 2 12 6
Improved ditto, exhausting more accurately 5 15 6
A small double-barrel air pump, with gage plate 5 5 0
A middle size ditto 6 16 6
A large size table ditto 10 10 0
Air pumps of the largest sort, exhausting more accurately,
from the constructions of the different inventors.
Condensing engines, from 5l. 5s. to 21 0 0
Papin’s digester improved, on a stand 5 15 6
_The principal Apparatus for the Air Pump as follow_:
Guinea and feather apparatus, demonstrating the
resistance of the air, with one, two, or three falls,
from 18s. to 1 11 6
A set of wind-mills, for the same demonstration 1 11 6
The brass hemispheres, shewing the air’s external
pressure, from 14s. to 1 10 0
A bell, proving that there is no sound without air 0 10 6
Improved constructions of this bell, from 1l. 1s. to 3 3 0
Lead weights, with bladder, &c. proving the air’s
elasticity 0 17 0
The double transferrer, that transfers a vacuum from one
receiver to another, by turning stop-cocks only 3 0 0
A model of a water-pump, exemplifying the nature of pumps,
and proving the absurdity of what is called suction 1 4 0
A single transferrer, plate and pipe, for a fountain 0 18 0
A copper air-pipe for experiments on infected air 0 17 0
A flat plate, collar of leathers, with sliding wire, for
placing on receivers 0 12 0
An apparatus for firing gun-powder in vacuo 0 18 0
A copper bottle, beam and stand, for accurately weighing
of air 2 12 6
A glass vessel for making a fountain in vacuo 0 5 6
Ditto on a larger, and different construction 0 16 0
A glass with a bladder, shewing the action of the lungs 0 6 0
Ditto mounted with the figure of a Bacchus 1 10 0
A balance beam and stand 0 7 0
A filtering cup shewing the porosity of vegetables 0 5 0
A plate and piece of wood for the same purpose 0 4 6
An apparatus for striking flint and steel in vacuo 0 18 0
The Torricellian experiment 0 18 0
Fruit stand 0 3 6
Candlestick 0 3 6
Syringe with lead weight 0 10 6
Six breaking squares, cage and cap 0 7 6
Glass bubble and stand 0 3 0
Hand and bladder glasses 0 3 6
With a great variety of receivers, and other apparatus,
described by various authors.
Exhausting and condensing syringes, from 10s. 6d. to 1 11 6
Exhausting syringes, with sets of cupping glasses, breast
glasses, and scarificator, complete 4 14 6
Air fountains of copper, with various jets, from 3l. 13s.
6d. to 7 7 0
ELECTRICAL MACHINES, with conductors and jars, from 2l.
12s. 6d. to 10 10 0
New and much improved ditto, from 3l. 13s. 6d. to 42 0 0
Electrical machines and complete apparatus, for medical
purposes, packed in boxes, the cylinder from seven to ten
inches diameter, from 6l. 6s. to 12 12 0
An electrical machine, with apparatus for philosophical
experiments and medical uses, packed in a box, the
cylinder about eight inches diameter 8 18 6
_Apparatus for Electrical Machines as follow:_
Electrical batteries of combined jars, from 2l. 12s. 6d.
to 10 10 0
An universal discharger, with a press 1 8 0
A quadrant electrometer, with divided arch 0 7 6
Jointed dischargers, with glass handles 0 10 6
Plain ditto, ditto 0 5 6
An useful and illustrative apparatus, compounded of the
luminous conductor, exhausted flask, two jars, exhausted
syringe, insulated stand, and wires with balls, &c.
complete 3 0 0
Luminous conductors, from 12s. to 1 5 0
Exhausted flasks, called Aurora Borealis 0 6 6
A thunder house, demonstrating the use of conductors 0 6 0
A powder house, for the same purpose 0 16 0
An obelisk or pyramid for ditto 0 10 6
A set of plain bells, three to a set 0 7 6
A new set of musical ditto, containing the gamut 1 10 0
A magic picture for giving shocks 0 7 6
An electrical cannon, to be discharged by inflammable air 0 16 0
Brass pistols for ditto 0 7 6
Spiral tubes, to illuminate by the spark, from 4s. 6d. to 0 10 6
Luminous names, or words, from 10s. 6d. to 1 11 6
Spotted jars, from 6s. to 0 10 6
A double jar for explaining the Franklinian theory 0 15 0
Copper plates and stands for dancing images 0 9 0
An electrical tin fire house 0 10 6
An electrical shooter and mark 0 5 0
A mahogany stand for eggs 0 4 6
A small head with hair 0 7 6
An artificial spider 0 1 6
An electrical swan 0 2 0
An electrical star 0 1 6
Balls of wood, bone, &c. each from 6d. to 0 2 6
A curious collection of working models, to be set in
motion by the electrical fluid, consisting of a corn mill
and a three-barrelled water-pump, worked by one crank
only: an orrery, shewing the diurnal motion of the earth,
age and phases of the moon, &c. and astronomical clock,
shewing the aspects of the sun and moon, age, phases, &c.
all delicately made of card paper, cork, and wire only,
packed in a deal case 2 12 6
Kinnersley’s electrical air thermometer 1 1 0
Cavallo’s atmospherical electrometer 0 12 0
Ditto, as improved by Saussure 1 1 0
Bennet’s gold leaf electrometer 0 18 0
Nicholson’s spinning doubler. 1 10 0
An electrophorus, from 10s. 6d. to 3 3 0
Conductors for the preservation of ships, houses, &c.
from lightning, from 3l. 3s. to 5 5 0
_The medical Apparatus consists of_,
Jars with electrometers, from 12s. to 1 1 0
A new medical ditto, for communicating shocks in the most
convenient and qualified manner 0 7 6
A pair of directors, glass handles, wood points, &c. 0 7 6
An electrometer to apply to the conductor 0 6 6
Electrical insulated stools and chairs, from 9s. to 5 5 0
A new perpetual inflammable air lamp, lighted by the
electrophorus, a curious and useful apparatus 4 4 0
A variety of other apparatus, too numerous to be inserted here, which
as well as the machines, are mounted from the most approved, eligible
methods, so as to render them in action both powerful and permanent.
_For a complete description of electrical apparatus, see the late Mr._
G. ADAMS’S Essay on Electricity, _8vo. six plates; price 6s. now sold
by_ W. _and_ S. JONES.
Barometers plain mounted from 1l. 11s. 6d. to 2 12 6
Thermometers for all the various purposes, from 9s. to 3 3 0
Six’s new thermometers, for shewing the extremes of heat
and cold, in the absence of the observer, from 1l. 11s.
6d. to 2 12 6
An hygrometer, shewing the moisture and dryness of the
air 0 10 6
Barometers, thermometers, and hygrometers, all in one
neat mahogany frame, from 4l. 4s. to 6 6 0
Barometers for measuring the heights of mountains from
7s. to 10 10 0
Marine barometers, diagonal, wheel, and statical ditto.
New hygrometers constructed by De Luc, &c. from 2l. 2s.
to 3 3 0
A rain gauge, with float and tin vessel 0 18 0
Wind gages, of the constructions of Dr. Lind, &c. 0 16 0
Hydrometers for discovering the strength and proportion
of compound in spirituous liquors, from 1l. 7s. to 3 3 0
Hydrostatic balances, from 1l. 1s. to 9 9 0
An apparatus for hydrostatical experiments, from 3l.
13s. 6d. to 21 0 0
Artificial magnets in bars, and sets of bars, from 2s.
6d. to 6 6 0
Ditto, in the shape of a horse-shoe, the strongest form,
from 1s. 6d. to 1 1 0
Ditto, combined to any number, from 12s. to 21 0 0
A box of magnetical apparatus illustrating a variety of
curious and entertaining properties in magnetism, from
5l. 5s. to 7 7 0
Dipping needles, variation, and other compasses, in great
variety.
Pyrometers, shewing the expansion of metals, from 3l. 3s.
to 10 10 0
The mechanical powers, for illustrating and demonstrating
the laws of motion, gravity, &c. a set neatly made in
brass, consisting of the balance, the pullies, the
different kinds of levers, the inclined plane, the wheel
and axle, the screw, a compound engine, a compound lever,
a double cone to move up an inclined plane, friction
wheels, weights, wedges, &c. complete 25 4 0
The same occasionally made on a more enlarged plan, for
a large auditory.
Ditto, with many parts of the apparatus made of mahogany,
and the whole set packed in a neat mahogany box 14 14 0
Separate sets of pullies, variously constructed and
combined.
A small carriage with inclined plane, and wheels of
different sizes, &c. experimentally proving the friction,
resistance, &c. of all sorts of wheel carriages 7 7 0
Ferguson’s compound engine, in which all the simple
mechanical powers work together 4 4 0
A whirling table, for explaining and demonstrating the
laws of the planet’s motion, the demonstrations of the
doctrine of the tides, and other properties of gravity
and centrifugal force, from 7l. 7s. to 16 16 0
Atwood’s elegant and accurate apparatus for
demonstrating the laws of accelerated and retarded
motion, and other interesting particulars 25 4 0
Several small mahogany models for explaining the center
of gravity, the line of direction, &c. 2 2 0
FOR PHILOSOPHICAL CHEMISTRY.
Glass bottles with bent necks, from 4s. to 0 10 6
A glass machine for impregnating water with fixed air,
and apparatus 2 12 6
Glass eudiometer tubes, for ascertaining the salubrity of
airs, &c. 0 10 6
Ditto as improved by Abbe Fontana, &c. 2 4 0
Gazometers by Priestley, Lavoisier, &c. from 1l. 1s. to 5 5 0
A blow-pipe, with various caps, for fluxing metals, &c. 0 7 6
Ditto, with silver spoon, megalascope, &c. 1 1 0
Ditto, ditto, with a variety of other necessary apparatus,
packed in a fish-skin case, forming Cronstedt’s complete
pocket laboratory, improved by Magellan 2 12 6
Magellan’s new portable lamp furnace, with the blow-pipe,
small glass retorts, &c. &c. for chemical as well as
mineralogical operations 4 14 6
Ditto, with the double bellows to apply to the blow-pipe 7 7 0
Double bellows, with deal table, and appendages, for
glass blowing 2 12 6
A wooden tub for water, and another for quick-silver,
with a selection of glass apparatus for performing the
late discovered experiments on air 6 6 0
A box, containing all the useful precipitants of Bergman,
&c. for analysing waters, and fluxes for the blow-pipe in
phials with glass stoppers, with Gottling’s printed
description of ditto 4 8 0
A mahogany case containing, in phials, a variety of
preparations for young persons to perform amusive and
instructive chemical experiments 3 13 6
Fumigating bellows for destroying insects in gardens, by
tobacco, from 1l. 6s. to 1 16 0
_Instruments of Recreation and Amusement._
The sensitive fishes, that have the property of swimming
to a piece of bread placed at the end of a stick; and,
when the other end is presented, of retreating and going
back, sensible, as it were, of no substance for them to
eat 0 6 6
The sagacious swan, that with a machine makes three
kinds of amusements--1st. the swan will point out the
secrets of the cards; 2d. it will point answers to 16
humorous enigmas; and 3d. disclose any particular hour
that was thought of, such as going to bed or rising;
packed in a case 1 18 0
A box containing four numbers and four letters, the order
of which may be discovered, if ever so secretly placed,
by means of a curious magic perspective 0 10 0
Ditto with five numbers, no perspective, but another very
similar box, made in neat mahogany boxes, and more
difficult to discover the reason of 1 18 0
A curious magic oracle, unfolding answers to any proposed
questions secretly taken out of a bag 0 16 0
A magic painter, exhibiting a copy of any one of eight
different paintings secretly chosen 0 10 6
A communicative mirror, shewing portraits of any one of
four secretly chosen; an elegant and curious instrument 2 12 6
A box containing five pieces of different metals, which
may any way be secretly placed, and their situation be
told by the magical perspective 1 8 0
An optical paradox, containing two perspectives, between
which a board may be placed, and the object will be seen
through them just as well as if the board was not there 0 7 6
Ditto mounted in mahogany, larger size 1 8 0
An optical deception, containing from six to twelve
different paintings, and which are looked down upon
through a perspective, and immediately there appears
another very different object, without any alteration of
the instrument whatsoever, or concern of the person
using it, from 1l. 11s. 6d. to 3 3 0
A diagonal opera glass, that shews persons on one side,
when the glass is presented to the object directly
before you, from 6s. to 0 15 0
A multiplying glass, making one object appear a great
number, from 1s. 6d. to 0 10 6
A set of anamorphoses or deformed pictures rectified by
a polished cylinder 2 2 0
A mathematical recreation, containing near seventy
figures on a card; any one figure being thought of, is
readily pointed out by any one using it 0 1 0
The two curious mathematical cubes, one of which is
gauged so as to prove it to be larger than the other,
yet the _larger_ one will actually _pass through_ the
smaller one, and not in any degree stretch it 1 0 0
The mathematical paradox, a piece of wood of one figure,
fits exactly, and passes through a triangular, a square,
and a circular hole 0 2 6
A double cone, that apparently rolls upwards up an
inclined plane, though actually descending 0 4 6
A magic well, in which may be put four buckets full of
different seeds, and fairly mixed together; any
particular seed of the above four kinds may be drawn up
separately, and, when examined, will be found to be
perfectly pure 1 11 6
A mechanical instrument, consisting of a cube and two
wooden handles, that supports itself on a point,
although the entire form and weight appear evidently
all on one side 0 12 0
A cylindrical mirror that produces two or three curious
optical effects 1 1 0
A magic or electrical bottle, that is charged by the
rubbing of a ribband only, and will give a shock to five
or six persons, with apparatus, in a pocket case 0 10 6
A set of the artificial fireworks imitated, containing
a series of brilliant and entertaining scenes of
fireworks, cascades of fire, &c. producing altogether a
pleasing effect, and not attended with any trouble,
noise, or danger, when using; the whole contained in a
neat mahogany box 7 7 0
The magic lanthorn apparatus conjoined with the above 10 10 0
Concave mirrors fitted up in boxes, to magnify prints,
to shew various deceptions in an entertaining and
pleasing manner, from 5l. 5s. to 12 0 0
* * * * *
Besides the preceding, a great variety of other articles too numerous to
be included in this catalogue, as well as any instrumental article made
from particular drawings, or as described by the different writers upon
mathematics, philosophy, chemistry, &c. &c.
* * * * *
Merchants, shopkeepers, schoolmasters, and others that sell again, are
supplied with the best articles, and with good allowance.
Letters from the country or abroad, containing orders or previous
enquiries, explicitly and punctually attended to.
_Les académies, observatoires et ecoles des pays etrangers ainsi que les
négociants, merchands et autres personnes peuvent se procurer toutes
sortes d’instruments de la meilleure qualité, tant pour les matériaux,
que la main d’œuvre, avec la plus grande expédition, et au plus juste
prix._
BOOKS PUBLISHED BY W. JONES.
A Description and Use of the New Portable Orrery, to
which is prefixed a short account of the solar system,
including the new planet, the burning mountain in the
moon lately discovered by Dr. Herschel, and the probable
reasons why the comet did not appear, as lately expected,
with two copper-plates, 4th edition 0 1 6
A Description and Use of the Hadley’s Quadrant, with an
account of all the new apparatus added to it, for taking
observations accurately, in order to determine the
longitude at sea, illustrated by copper-plate figures,
2d edit. 0 1 0
A Description and Use of the Pocket Case of Mathematical
Drawing Instruments, illustrated by copper-plate figures 0 0 8
Methods of finding a Meridian Line, to set sun-dials,
regulate clocks and watches, &c. 0 0 6
Directions for finding a Meridian Line, on a card 0 0 3
A Concise Explanation of the Barometer, Thermometer, and
Hygrometer, with rules for predicting changes in the
weather, in a small book, 6d. on a pasteboard, varnished 0 1 0
Cowley’s Illustration of SOLID GEOMETRY, containing 42
copper-plates of moveable figures; a work very useful
and convenient for teachers and young students of
geometry, as the figures, when folded up, form exactly
the solid figures of the Platonic bodies, conic sections,
and several portions of Euclid’s Elements, &c. &c. boards 0 18 0
OTHER BOOKS SOLD BY W. AND S. JONES.
QUARTO.
The New Encyclopædia Britannica (printed at Edinburgh) a
new edition, quarto, in 18 vols, or 36 parts, now
complete, in boards price 18 18 0
This Dictionary of Arts and Sciences is upon a new and enlarged plan,
and contains the systems of the different arts and sciences, under the
different heads, as well as the explanations of the various detached
terms.
Hutton’s (Dr.) Mathematical Dictionary, 2 vols. boards 2 12 0
Nicholson’s Philosophical Journal, four numbers, all that
are now published, each 2s. 6d. 0 10 0
The Philosophical Transactions of the Royal Society,
containing 11 vols. of the Abridgement; and from thence,
the Continuation at large to the present time; the index,
with Birch’s and Sprat’s history, 5 vols. all in uniform
clean calf binding and tooled backs, in 58 vols. 60 0 0
Vince’s Treatise on Astronomy, 1st vol. sewed 1 4 0
OCTAVO.
Cavallo’s Treatise on Magnetism, with Supplement 0 8 0
Kelly’s Practical Introduction to Spherics and Nautical
Astronomy 0 6 0
Moore’s Practical Navigator, or Seamen’s Daily Assistant 0 6 0
Nicholson’s First Principles of Chemistry, boards 0 7 6
---- Introduction to Natural Philosophy, 2 vols. 0 12 0
Nautical Almanacks, a complete set bound, 28 volumes 5 5 6
Ditto for any year to 1800 0 3 6
Requisite Tables to the above, unbound 0 5 0
Robertson’s Elements of Navigation, new edit. 2 vols. 1 0 0
Wale’s Method of finding the Longitude by Time-keepers,
and Description of a Portable Transit Instrument, &c. 0 2 6
FINIS.
LONDON, _Dec._ 1, 1797
W. _and_ S. JONES _take this Opportunity of informing the Public that
they have purchased the Stock and Copyright of the several
Philosophical Essays by the late Mr._ GEORGE ADAMS, _of Fleet Street,
and that they are now sold at their Shop in Holborn. The following are
those now in print, and to be had as above._
I. AN ESSAY ON ELECTRICITY, explaining clearly and fuly the principles
of that useful Science, describing the various Instruments that have
been contrived either to illustrate the Theory, or render the Practice
of it entertaining. The different Modes in which the Electrical Fluid
may be applied to the human Frame for medical Purposes, are distinctly
and clearly pointed out, and the necessary Apparatus explained. To which
is now added, A LETTER to the AUTHOR, from Mr. JOHN BIRCH, Surgeon, on
the Subject of MEDICAL ELECTRICITY. _Fourth Edition_, 8vo. Price 6s.
illustrated with six Plates.
II. AN ESSAY ON VISION, briefly explaining the Fabric of the Eye, and
the Nature of Vision; intended for the Service of those whose Eyes are
weak and impaired, enabling them to form an accurate Idea of the State
of their Sight, the Means of preserving it, together with proper Rules
for ascertaining when Spectacles are necessary, and how to choose them
without injuring the Sight. 8vo. Boards, Price 3s. _Second Edition._
III. ASTRONOMICAL AND GEOGRAPHICAL ESSAYS, containing, 1. A full and
comprehensive View, on a new Plan, of the general Principles of
Astronomy, with a large Account of the Discoveries of Mr. Herschel. 2.
the Use of the Celestial and Terrestrial Globes, exemplified in a
greater Variety of Problems than are to be found in any other Work: they
are arranged under distinct Heads, and interspersed with much curious
but relative Information. 3. The Description and Use of small Orreries
and Planetaria, &c. 4. An Introduction to Practical Astronomy, by a Set
of easy and entertaining Problems. _Third Edition_, 8vo. Price 10s. 6d.
in Boards, illustrated with sixteen Plates.
IV. AN INTRODUCTION TO PRACTICAL ASTRONOMY, or the Use of the Quadrant
and Equatorial, being extracted from the preceding Work. Sewed, with two
Plates, 2s. 6d.