A catalogue of optica, mathematical, and philosophical instruments, made and sold by W. and S. Jones / [William Jones].
- William Jones
- Date:
- [1830]
Licence: Public Domain Mark
Credit: A catalogue of optica, mathematical, and philosophical instruments, made and sold by W. and S. Jones / [William Jones]. Source: Wellcome Collection.
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![Si d. 5 0 L6] €• hunter’s Sectors of various lengths, wood cr brass, from 2s. to 5 A New Pocket 10-inch box sliding rule for solving all sorts of problems in trigonometry, mensuration, engineering, &c. 0 5 0 Measuring tapes, 1, 2, 3, and 4 poles, 6s. Js. 6d. Qs. 6cl.to 1 I 0 Pedometers to ascertain distances by carriages,&c. 2l.l2s.6d. 10 O 0 Miner’s compasses in wood or brass for working in subterra¬ neous grounds, from ll. K5r, to. 7 17 6 Cases of drawing instruments, from 5s^6d. to. 6 6 0 Magazine, or complete collection of every kind of useful drawing instruments, from 5l. 5s. to ...... ... 3(5 15 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 110 Proportional compasses, from \1. llr. 6d. to.. 3 3 0 Elliptical compasses of various degrees of perfection and uti¬ lity, from ll. 1j. to .. .. 5 5 O Farey’s newly constructed pocket elliptic machine, in brass, for describing ellipses, in the most accurate manner.... 550 Triangular compasses, by which three points at once may be transferred, from 13*. 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 ]/. 8s. to..... 3 13 6 Bow compasses for describing very small circles, from 3s. 6d. tp 0 J 6 Perspective compasses to take the relative positions of objects, angles, &c. to be transferred on paper... 1 18 0 Parallel rulers of different constructions,, from 2s. to. 2 12 6 Protractors of brass for laying down angles, from 2s. to_ l i o Ditto circular with a nonius and moveable index.......... 2 2 0 Ditto, ditto, very best with rack and pinion. 4 4 q Sets of protracting and plotting scales ; instruments for divid¬ ing or transferring lines . For describing circles from four to six feet radius or to the utmost conceivable distance— Gunners callipers—Gunners levels or perpendiculars—- Shot gauges—Shell ditto—Gunners quadrants, with a plummet or level, and adjusting screw, &c. and all other instruments for graphical and military purposes. Hadley’s Quadrants, mahogany, the divisions on wood 2 2 0 Ditto mahogany with ivory arch and nonius, doubleobservation 2 12 6 Ditto, ebony and brass, best glasses, engine divided, &c. .. 3 3 0 Ditto, with tangent and adjusting screws, &c. .. 313 6 Ebony and brass mounted best sextants, from 4/. 4s. to 7 17 6 A ten-inch common brass sextant... g g q Metal 8, 9, or 10 inch ditto, framed on a principle the least liable to expand or strain,with adjusting screws, telescopes, and other auxiliary apparatus, divided to 30//,15//, or 10 the best for taking distances accurately, to determine the longitude at sea, &c. from 13/. 135. to.... 16 16 0 A new 3-in. pocket box sextant, angles to a minute, 3/.3r.to 5 5 0 A. ten-inch improved reflecting circle, that enables an expert observer to obviate the very minute errors of a sextant, or by repeating observations, to reduce such errors to im¬ material quantities, from 18/. 18r. to. 26 5 0 Portable brass jointed stands for the sextant or circle, in a](https://iiif.wellcomecollection.org/image/b30381897_0006.jp2/full/800%2C/0/default.jpg)
