Part 58

Ditto, and best compound ditto, packed together in one mahogany box 21 0 0

The LUCERNAL MICROSCOPE, as improved by W. JONES, exhibiting images of opake and transparent objects by night or day, in a manner singularly pleasing, brilliant and distinct, with upwards of 100 objects, proper apparatus, patent lamp, &c. 16 16 0

Ditto combined with a solar, compound, &c. apparatus, forming the most perfect collection of microscopical apparatus 35 14 0

A portable optical apparatus, consisting of a scioptic ball and socket, a solar microscope, Wilson’s microscope, a pocket compound microscope, a pocket telescope, and solar telescope, in mahogany and brass 3 13 6

Pocket microscopes for opake objects, from 16s. to 2 12 6

Botannic microscopes for flowers, &c. from 5s. to 1 11 6

A new universal pocket ditto, adapted to all sorts of objects 1 6 0

Cloth microscopes, from 2s. 6d. to 0 10 6

Magic lanthorns, from 1l. 4s. to 1 8 0

Sliders for ditto in great variety of subjects, each 0 3 6

A new set of moveable painted sliders, shewing the fundamental principles of astronomy, with the real and apparent motions and positions of the planets, stars, &c. &c. accompanied by a proper improved lanthorn, complete 13 13 0

Small magic lanthorns, with twelve sliders complete, at 7s. 6d. 10s. 6d. 12s. and 1 0 0

Ditto with twelve sliders of best English paintings 2 2 0

Optical diagonal machines for viewing prints, from 1l. to 1 11 6

Perspective views in great variety for ditto, each 0 1 6

Scioptic balls and sockets from 10s. 6d. to 1 11 6

An artificial eye in brass, to exemplify the nature of vision 1 11 6

_For a description of this instrument, as well as of spectacles, reading-glasses, &c. see the late Mr._ G. ADAMS’S Essay on Vision, _8vo. price 3s. now sold by_ W. _and_ S. JONES.

Camera obscuras for the pocket, from 9s. to 1 16 0

A new invented folding ditto, very portable 2 2 0

Large ditto, shutting up like a book, or neat portable chest, the objects represented on paper, from 4l. 14s. 6d. to 8 18 6

Concave and convex glass mirrors, in plain black frames, four, five, six, and seven inches diameter, each 9s. 12s. 14s. and 0 18 0

Eight inches diameter ditto 1 1 0

Nine inches ditto 1 7 0

Ten inches ditto 1 12 0

Twelve inches ditto 2 5 0

Fifteen inches ditto 3 13 6

Eighteen inches ditto 6 6 0

Twenty-one inches ditto 11 11 0

Twenty-four inches ditto 16 16 0

Concave mirrors, ground cylindrically, possessing several curious properties in the deformation of objects, according to the size, from 1l. 1s. to 5 5 0

Concave metal burning mirrors, superior to the glass ones, from 3l. 13s. 6d. to 21 0 0

Glass prisms, plain, or mounted on stands, from 7s. 6d. to 1 11 6

A curious set of optical models, where the rays of light are represented by silken strings, and illustrating the principles of vision, telescopes, prisms, &c. packed in five cases 6 16 6

MATHEMATICAL INSTRUMENTS.

THEODOLITES of the common construction, and of the best workmanship, from 4l. 4s. to 31 10 0

A portable theodolite, with a telescope, level, and vertical arch 7 7 0

Ditto larger, with parallel plates, &c. divided to two minutes 12 12 0

Ditto with rack-work motions, divisions to a minute 22 1 0

A new-improved theodolite, with two telescopes, and contrivances for every accurate adjustment 36 15 0

A new very portable theodolite, by rack-work, measuring angles with equal accuracy as those of the common large sort, is at the same time applicable for taking altitudes, and is truly adapted for the purpose of levelling 8 8 0

A 4-inch further improved ditto, by which the vertical and horizontal angles are shewn at the same time, with portable staves, &c. 10 10 0

Circumferentors, much used in wood lands, from 2l. 2s. to 4 4 0

An improved ditto, contrived to answer the purposes of a common theodolite, level, altitude instrument, &c. 4 14 6

Surveying crosses or squares, on a staff, from 12s. to 1 11 6

A brass cylindrical ditto, with a staff 0 18 0

Ditto with compass, agate capped needle, &c. 1 11 6

Improved ditto, with rack-work and pinion, and moveable divided limb, making a very portable cross-staff, compass and theodolite in one instrument 2 18 0

Levels of the latest improvements, from 2l. 2s. to 12 12 0

Station staves, with sliding vanes, for levelling 2 12 6

Plane tables, with index, sights, &c. complete, from 3l. 13s. 6d. to 5 5 0

Pentagraphs, by which any person unskilled in drawing may copy plans, surveys, profiles, drawings, &c. in any proportion to the original, from 1l. 16s. to 6 16 6

Perambulators or measuring wheels, from 61. 6s. to 10 10 0

Gunter’s measuring chain, according to strength, from 5s. to 0 11 0

---- navigation scale, from 2s. to 0 4 0

---- ditto improved by Donn, with book of directions 0 5 0

---- ditto improved by Robertson, with brass adjusting screws, &c. being the completest scale of the kind 1 10 0

---- sectors of various lengths, from 2s. to 1 11 6

A new pocket ten inch box sliding rule for solving all sorts of problems in trigonometry, &c. from 2s. 6d. to 0 4 0

Measuring tapes, one, two, three, and four poles, 5s. 7s. 6d. 9s. 0 10 6

Pedeometers for ascertaining distances in walking or riding, of a watch size for the pocket, and also to apply to carriages, from 31. 3s. to 12 12 0

Miner’s compasses, for working in subterraneous grounds, from 10s. 6d. to 1 11 6

Cases of drawing instruments, from 4s. 6d. to 5 5 0

Magazine, or complete collection of every kind of useful drawing instruments, from 5l. 5s. to 35 0 0

A new portable drawing board and seat, the board folds up for the pocket, and the legs of the seat form a walking stick 0 18 0

Proportional compasses, from 1l. 10s. to 3 3 0

Elliptical compasses of various degrees of perfection and utility, from 16s. to 4 14 6

Spiral and elliptical compasses, from 6s. 6d. to 10 10 0

Triangular compasses, by which three points at once may be transferred, from 13s. to 1 5 0

Hair compasses that take extents to a great accuracy 0 7 6

Beam compasses for dividing large circles, projections, &c. from 1l. 1s. to 10 0 0

Bow compasses for describing very small circles, from 2s. 6d. to 0 12 0

Perspective compasses to take angles, &c. from 1l. 5s. to 2 12 6

Parallel rulers of different constructions, from 2s. to 2 12 6

Protractors for laying down angles, from 2s. to 1 1 0

Ditto, with a nonius and moveable limb 2 2 0

Ditto, ditto, with teeth and pinion 4 10 0

Sets of protracting and plotting scales; instruments for 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