28 MATHEMATICAL INSTRUMENTS,
£ S.
Camera obscura, for the pocket . . 10s. to 110
Folding ditto . . . . £2 12s. 6d. to 3 13
Large folding portable ditto . £7 17s. 6d to 9 19
Wollaston’s camera lucida . . £1 10s. to 2 12
Professor Amice’s improved ditto . £2 12s. 6d. to 3 3 Improved drawing board for ditto . £1 16s. to 2 2
Phantasmagoria, with figures . . £1 16s. to 4 4
Magic lanthorn, with figures . . £1 10s. to 3 3
Small lanthorn, with twelve slides . 7s. 6d. to 2 2
A great variety of phantasmagoria and magic lanthorn
slides . . . . . . 3s. to 0 5
Glass prism, plain . . . . . 3s. to 0 14
Ditto, mounted on stand . . . £1 Is. to 110
MATHEMATICAL INSTRUMENTS.
Best 7-inch theodolites, with one or two telescopes,
tangent screw adjustments, &c. . £31 to 42 0
Ditto, 6-inch ditto, ditto . . . £28 to 37 0
Ditto, 5-inch ditto, ditto . . £17 17s. to 23 0
6-inch theodolite, with sights, ball, and socket joint
for staff head . . . . . .60
Best spirit levels, of various sizes, with erect telescopes, full divided compass, parallel plates, mahogany staff, and case . £3 10s. to 16 0
Plain spirit levels . . . . . 7s. to 1 0
Ditto, with sights . . . . . 12s. to 2 10
Circumferentors . . . . £2 2s. to 3 13
Plain table . . . . £3 13s. 6d. to 8 8
Station pointer . . . . . . .6 10
Protractors . . . . £2 12s. 6d. to 5 15
Perambulators, or measuring wheel . £7 7s. to 9 9
Way wisers, fitted to carriage . . £5 5s. to 8 8
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