Oxford, swarms of gnats which appeared at note, 188--the mischiefs
they occasioned, ibid.
P.
Palpi of insects described, 193
Parrot-fish, scale of, 355
Particles of blood to examine, 149
---- ---- their true form ascertained, ibid. and note 626
Paste eel described, 462
Pearch, sea, scale of, 356
Pearl micrometer, Coventry’s, 60
Pediculus humanus described, 619
Plancus on minute shells, 629
Plant lice, see aphides
Plants, their leaves to examine, 147
Pocket botanical and universal microscope, 124
Polypes to procure and feed, 153--infested with lice, 156--to preserve
in health, ibid.--to observe with accuracy, 157--to preserve in
sliders, ibid.--their food, 291
Pores of skin to examine, 147
Portable microscope and telescope, 125
Proboscis of insects, to dissect, 144--culex--tabanus--bee,
ibid.--described, 181--bee, ibid.--butterfly, 186--gnat, 187--tabanus,
188
Prince, (Rev. Dr.) his improvement on lucernal microscope, 84
Ptinus fatidicus, note 688
---- pulsator, ibid.
Puceron, see aphides
Pulex aquaticus food for polypes, 155
---- irritans described, 616
Pupa, change of insects to, 229
R.
Ray, incident, 32--refracted, ibid.
Reaumur on the motion of insects, 212
---- ---- fecundity of queen bee, 290
Redi, his observations on the production of flies, 174
Reflections on cruelty to animals, 150, note ibid.
Refraction, its principles, 32--ascertained by experiments, 33
Remarks on the substance of butterflies wings, note 207
---- on Barbut’s opinion on the sense of hearing in insects, note 217
---- on collecting Asiatic insects, 696
Respiration of insects, 265--experiments on, by Lyonet,
267--Musschenbroeck, 268
---- musca pendula, 269
Richardson’s experiments on the generation of aphides, 275
Rind of vegetables to prepare, 160
Romans probably acquainted with the single microscope, 3
---- spectacles known to them, ibid.
S.
Salts and saline substances, to prepare, 163
---- their crystallization, 600--what understood by it, 601--phænomena
of ditto, 602--their various figures, 603--Bergman’s account of their
forms, 605
---- list of, for microscopic observation, 710
Sap vessels of plants, to fill, 162
Scales of fish to examine, 147--eel, to prepare, ibid.
---- parrot fish, 355--sea pearch, haddock--West-India pearch--sole
fish, 356
Scutellum of insects, 200
Sections of wood, instrument for cutting, 127--appendage to ditto, 128
Seeds, vegetable, a descriptive list of a variety of,
645--lithospermum, ibid.--cyminum, 646--papaver, 647--cardirus,
ibid.--plantago, 648--staphis agria, 649--anisum, ibid.--fœniculum,
651--grana Paradisi, 652--petroselinum, 653--petroselinum Macedonicum,
654--coriandrum, 655--seseli, ibid.--hyoscyamus, 657--cicer,
658--laurus, 659--ficoides afra, 660--palma aricefera, 661--juniperus,
ibid.--santonicum, 662--scabiosa, 663
Sentiments of learned men in earlier times on minute parts of
creation, note 177
Shakspeare, quotation from, on the feeling of insects, note
150--parody on a passage in, note 690
Shells, to view, 148--minute, arrangement and description of,
629--manner of procuring them, 632--observations on, ibid.--serpula,
633--dentale, 635--patella, ibid.--helix, ibid.--turbo, 636--trochus,
638--buccinum, 639--voluta, ibid.--bulla, 640--nautilus,
ibid.--Mytilus, 642--anomia, 643--arca, ibid.--cardium, 644--lepas,
ibid.--echinus, ibid.--asterias, 645
Shoots, vegetable, to obtain, 159
Silk-worm, its eyes, 196--metamorphosis, 240
Skin, pores of, to examine, 147
---- of sole-fish, 356--lizards, 147
Smith, his compound microscope, 17
Sole-fish, scale of, 356--skin of, ibid.
Spanish-fly, its utility in medicine and commerce, note 175
Spider, eyes of, 199--described, 621
Spiracula of insects, 201
Stemmata of ditto, 199
Sternum of ditto, 200
Stillingfleet, his remarks on the importance of natural history, 331
Sting of bee to dissect, 144--described, 214
Stings of insects, 213
Strength of minute animals, note 427
Swammerdam uses the single microscope, 6--his method of preparing
objects, 137--his microscope described, 138--manner of dissecting,
ibid.
Swift, quotation from, on the death-watch, note 689
System, Linnean, commended, 168
T.
Tabanus, its proboscis described, 188
Tail of insects, 213
Telescope, portable microscope and, 125
Termes pulsatorium, note 688
Termites or white ants, history of, 308
Thorax of insects, 201
Thrips physapus described, 350
Timber, organization of, 574
Tincture of cochineal, to prepare, 161
Tongue of insects, 181
Transformation of insects, 220--rhinoceros beetle, 245--musca
chamæleon, 248--pendula, 256--libellula, 257--cynips, 260--aphides,
ibid.--hippobosca equina, 261--theory of, by Bonnet, ibid.
Transparent objects to examine with the lucernal microscope, 74--to
transmit on a screen, 75
---- ---- list of, 614
Trees, leaves of, to examine, 147
Trunk of insects, 201
Tubularia campanulata, 411
V.
Vegetable substances, to prepare for the microscope, 159--young
shoots, ibid.--rind, 160--blea, 162--sap vessels, to fill, 162
---- seeds, descriptive list of, 645
Vegetables, their beauty and perfection, 574
Vinegar eel described, 461
Vision, its principles shewn by experiments, 27
Vivacity of minute animals note, 427
Vorticellæ described, 396--anastatica, 397--pyraria, 400--cratægaria,
ibid.--opercularia, 401--umbellaria, 402--berberina, 406--digitalis,
ibid.--convallaria, 407--urceolaris, 408--tubularia campanulata, 411
W.
Walker on minute shells, 630--commended by Sir Jos. Banks,
ibid.--extracts from, 633
Wasp, its sting to dissect, 145
Water, eel in fresh, 468--in salt ditto, 469
Wheat, eel in blighted, 467
Wheel animal, 549
Willughby detects a pretended discoverer of animalcula, note 432
Wilson, his screw-barrel microscope, 115--ditto with scroll, 117
Wings of insects to dissect, 143
---- forficula auricularia, ibid.--notonecta, ibid.--butterflies and
moths, 144, 207--described, 201--hemerobius perla, 206
Wisdom, divine, displayed in the creation, 267, 174--providence,
174--benevolence, 175
Withering, his botanical microscope, 115
Wood, instrument for cutting sections of, 127,--appendage to, 128
Worm, silk, its eyes described, 196
Worms, red, food for polypes, 155
Z.
Ziehr improves solar microscope, 20
[Illustration: _PLATE 1._
_T. Milne del._
London. _Printed for & Published by_ George Adams _N.^{o} 60, Fleet
Street, as the act directs. May 20, 1787._
_Jn. Lodge sc._]
[Illustration: _Pl. 2A_
_London Printed for & Publish’d by Geo.^{e} Adams N.^{o} 60 Fleet Street
May 20^{th} 1787._
_Goodnight sculp._]
[Illustration: _Pl. 2B_]
[Illustration: PLATE III.
_T. Milne del._
London. _Printed for & Published by_ George Adams _N.^{o} 60, Fleet
Street, as the act directs. May 20, 1787._
_J. Lodge sculp._]
[Illustration: PLATE IV.
London. _Printed for & Published by_ F. Kanmacher, and W. & S. Jones,
_135 Holborn as the Act directs, 1.^{st} October 1797._
_J. Hawksworth Sculp._]
[Illustration: PLATE V.
_London Printed for & Publish’d by Geo.^{e} Adams N.^{o} 60 Fleet Street
May 20^{th} 1787._]
[Illustration: PLATE VI.
_London Printed for & Publish’d by Geo.^{e} Adams N.^{o} 60 Fleet Street
May 20^{th} 1787._]
[Illustration: _Plate 7A._
_London Printed for & Publish’d by Geo.^{e} Adams N.^{o} 60 Fleet Street
May 20^{th} 1787._]
[Illustration: _Pl. 7B._
_London Printed for & Publish’d by Geo.^{e} Adams N.^{o} 60 Fleet Street
May 20^{th} 1787._]
[Illustration: PLATE VIII.
_London Printed for & Publish’d by Geo.^{e} Adams N.^{o} 60 Fleet Street
May 20^{th} 1787._]
[Illustration: PLATE IX.
_T. Milne del._
London. _Printed for & Published by_ W. & S. Jones, _135 Holborn_, & F.
Kanmacher _Apothecaries Hall, as the Act directs, 1,^{st} December
1797._
Jn. Lodge sc.]
[Illustration: PLATE X.
_London Printed for & Publish’d by Geo.^{e} Adams N.^{o} 60 Fleet Street
May 20^{th} 1787._]
[Illustration: PLATE XI.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street as the act directs. May 20, 1787._
_J. Lodge sc._]
[Illustration: PLATE XII.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street as the act directs. May 20, 1787._
_Jn.^{o} Lodge sculp._]
[Illustration: PLATE XIII.]
[Illustration: PLATE XIV.
London. _Printed for & Published by_ F. Kanmacher, and W. & S. Jones,
_135 Holborn, as the Act directs, 1.^{st} November 1797._
_J. Hawksworth sculp._]
[Illustration: PLATE XV.
London. _Printed for & Published by_ W. & S. Jones, _135 Holborn, and_
F. Kanmacher, _Apothecaries Hall, as the Act directs, November 1.^{st}
1797._
_J. Hawksworth sculp._]
[Illustration: PLATE XVI.
_T. Milne del._
London _Printed for & Published by_ George Adams, _N.^{o} 60, Fleet
Street, as the Act directs. May 20, 1787._
_Jn.^{o} Lodge sc._]
[Illustration: PLATE XVII.
_London Printed for & Publish’d by Geo. Adams, 60 Fleet Street, May
20^{th} 1787._]
[Illustration: PLATE XVIII.
_London Printed for & Publish’d by Geo. Adams, 60 Fleet Street, May
20^{th} 1787._]
[Illustration: PLATE XIX.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street, as the act directs. May 20, 1787._
_Jn.^{o} Lodge sc._]
[Illustration: PLATE XX.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street, as the act directs. May 20, 1787._
_Jn.^{o} Lodge sc._]
[Illustration: PLATE XXI.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street, as the Act directs. May 20, 1787._
_Jn. Lodge sc._]
[Illustration: PLATE XXII.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street, as the act directs. May 20, 1787._
_J. Lodge sc._]
[Illustration: _Pl. 23 A._
_J. Wigley. Sc._
London. _Printed for & Published by_ George Adams, _N.^{o}_]
[Illustration: _Pl. 23.B._
_60 Fleet Street, as the act directs. 20 May 1787._
_Bonles Sc._]
[Illustration: _Pl. 24.A._
_J. Wigley. Sc._
London. _Printed for & Published by_ George Adams, _N.^{o}_]
[Illustration: _Pl. 24.B._
_60 Fleet Street, as the act directs. 20 May 1787._
_Bonles Sc._]
[Illustration: PLATE XXV.
_T. Milne Delin.^{t}_
_London Published May 1.^{st} 1787. Geo.^{e} Adams N.^{o} 60 Fleet
Street._]
[Illustration: _Plate_ XXVI.
_London Published May 1.^{st} 1787. Geo.^{e} Adams N.^{o} 60 Fleet
Street._]
[Illustration: _PLATE_ XXVII.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street, as the act directs. May 20, 1787._
_J. Lodge sc._]
[Illustration: PLATE XXVIII.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street, as the act directs. May 20, 1787._
_J. Lodge scu._]
[Illustration: PLATE XXIX.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street, as the act directs. May 20, 1787._
_J. Lodge sc._]
[Illustration: PLATE XXX.
_London Printed for & Publishd by_ Geo.^{e} Adams _N.^{o} 60 Fleet
Street May 20^{th} 1787._]
[Illustration: PLATE XXXI.
_T. Milne del._
London. _Printed for & Published by_ George Adams, _N.^{o} 60 Fleet
Street, as the act directs. May 20, 1787._
_Jn. Lodge sc._]
[Illustration: PLATE XXXII.]
A
CATALOGUE
OF
Optical, Mathematical, and Philosophical
Instruments,
MADE AND SOLD BY W. AND S. JONES,
[No. 135,]
NEXT FURNIVAL’S-INN, HOLBORN, LONDON.
OPTICAL INSTRUMENTS.
_£._ _s._ _d._
Best double-jointed standard gold spectacles, with
pebbles, and fish-skin gold-mounted case 16 16 0
Ditto single-jointed, with ditto case 10 10 0
Best double-jointed silver ditto, with pebbles 1 16 0
Ditto, ditto, with glasses 1 1 0
Best single-jointed, with pebbles 1 8 0
Ditto, with glasses 0 13 0
Best double-jointed steel ditto, with glasses 0 9 0
An improved sort of ditto for ladies 0 10 6
Second best double-jointed steel spectacles, with spring
case 0 7 6
Common ditto 0 4 6
Best single-jointed steel spectacles 0 4 6
Second best ditto 0 2 6
Common ditto 0 1 6
Tortoishell spectacles, silver-jointed, with pointed, and
other shaped sides, peculiar for their lightness and
uninterruption of dressed hair, in morocco leather cases 0 10 6
Ditto, double-jointed frames 0 15 0
Spectacles for eyes that have been couched 0 7 6
Ditto with green glasses for very weak and inflamed eyes,
according to the frames, from 6s. to 1 1 0
Ditto for the same purpose, with new contrived portable
shades to screen the eyes from candle, or other light 0 15 0
Nose spectacles in silver 0 7 6
Ditto in tortoishell and silver. 0 4 0
Ditto in horn and steel 0 1 6
Spectacle cases in very great variety, from 2d. each to 10 10 0
Concave glasses for short-sighted persons, in horn cases 0 1 6
Ditto in tortoishell, pearl, silver, &c. from 2s. 6d. to 2 2 0
Ditto in new-contrived frames for gentlemen when shooting 0 16 0
Reading and burning glasses, in various mountings, from
1s. to 1 16 0
Convex glasses for watch-makers, engravers, &c. from 1s.
to 0 10 6
Gogglers, to guard the eyes from the dust or wind 0 3 0
New green-light shades for the eyes 0 6 6
Opera glasses, in great variety of mountings, from 4s.
6d. to 2 12 6
Ditto, on an improved construction of glasses, plain
mounting 1 1 0
REFRACTING TELESCOPES of various lengths, from 6s. to 1 16 0
Ditto to use at sea by night, from 1l. 11s. 6d. to 2 12 6
Achromatic stick telescopes of various lengths from 18s.
to 4 0 0
The new-improved ditto, with three sliding brass tubes,
by which an instantaneous view of the object is obtained,
and shuts up very short for the pocket, of one foot in
length, in a case 1 11 6
Second best two-drawers, ditto 1 1 0
Twenty inch best three-drawers, ditto 2 12 6
Ditto second best two-drawers 1 10 0
Two feet best three-drawers, ditto 4 4 0
Ditto second best, ditto 3 3 0
Three feet, best four-drawer ditto 6 6 0
Second best ditto 4 4 0
The preceding telescopes, fitted up elegantly with silver
or plated tubes, from 2l. 2s. to 21 0 0
Astronomical eye-pieces and portable brass stands for the
above, from 10s. 6d. to 2 12 6
The new-improved 2¹⁄₂ feet achromatic refractor, on a
brass stand, mahogany tube, with two sets of eye-glasses,
one magnifying about forty times for terrestrial objects,
and the other about seventy-five times for astronomical
purposes, packed in a mahogany box 9 9 0
Ditto, ditto, the tube all brass, with three eye-pieces 11 1 6
The 3¹⁄₂ feet ditto, ditto, mahogany tube 17 6 6
Ditto, ditto, brass tube 19 8 6
Ditto all in brass, with rack-work motions, &c. 24 3 0
Achromatic perspective glasses for the pocket, in brass,
&c. tubes, with a change of eye-glasses, from 12s. to 3 3 0
New-improved ditto, answering the purpose of an
opera-glass, with a compass, and helioscope for viewing
the sun, from 1l. 3s. to 2 2 0
New-improved achromatic pocket telescope, which, by a
small apparatus within its tubes, is readily converted
into a compound microscope 3 13 6
An improved portable seven-inch achromatic telescope in
brass, with a stand that packs up into the tube of the
telescope, adapted for astronomical uses 3 13 6
REFLECTING TELESCOPES, fitted up either upon the
_Gregorian_, _Newtonian_, or _Herschelian_ principles,
with improved wood, or metal stands, and other apparatus
for making celestial observations in the most commodious
and accurate manner--The general prices are as follow:
-- Fifteen feet in length, the large metal fifteen inches
in diameter, from 250l. to 500 0 0
-- Twelve feet in length, fourteen inch metal 200 0 0
-- Ten feet in length, twelve inch metal 150 0 0
-- Eight feet in length, eleven inch metal 140 0 0
-- Six feet in length, nine inch metal 100 0 0
-- Four feet long, in brass tubes, with portable brass
or mahogany framed stands, from 40l. to 100 0 0
_Those reflectors that are constructed upon the principles of_ Newton
_or_ Herschel _are about twice the above lengths in the tubes. The
reflectors upon the usual Gregorian construction are made with the
vertical motion upon a new principle, so as to render them more firm
and steady while in use, than any reflectors mounted in the old
manner._
A four feet seven inch aperture Gregorian reflector, with
the vertical motion upon a new invented principle, as
well as apparatus to render the tube more steady in
observation; according to the additional apparatus of
small speculums, eye-pieces, micrometers, &c. from 70l.
to 100 0 0
Three feet long, mounted on a brass stand, common
mounting 23 2 0
Ditto with rack work motions, improved mounting, and
metals 36 15 0
Two feet long, without rack-work, and with four
magnifying powers, improved, 13l. 13s. to 14 14 0
Ditto improved, with rack-work motions 22 1 0
Eighteen inch on a plain stand 8 8 0
Twelve inch ditto 5 5 0
Telescopes of both the above kinds fitted up. with
equatorial, &c. motions, micrometers, adjusting,
compensating, &c. apparatus, for the most accurate
astronomical purposes.
Common MICROSCOPES, from 2s. 6d. to 1 1 0
Wilson’s single pocket microscopes, from 18s. to 2 12 6
Compound microscopes improved, from 2l. 12s. 6d. to 5 5 0
New improved universal ditto 6 6 0
Ditto with the most complete apparatus 10 10 0
Solar microscopes in brass, improved, from 4l. 14s. 6d.
to 6 6 0
The new opake and transparent solar microscopes, with
improved apparatus, from 10l. 10s. to 16 16 0
Ditto of a larger size, with additional megalascopic
apparatus, from 14l. 14s. to 19 19 0
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