MATHEMATICAL INSTRUMENTS.
29
£ s.
Gunter’s measuring chain . . . 6s. to 0 14
Gunter’s scales .... 2s. 6cl. to 0 5
Measuring tape, in boxes . . . 5s. 6(1. to 1 4
Pentagraph, for reducing or enlarging plans
.£1 11s. 6d. to 5 15
Upright cases of drawing instruments, in brass,
. . . . . . 10s. 6d. to 3 0
Ditto, in flat mahogany, rosewood, and leather cases
.£1 10s. to 15 0
Ditto, ditto, in silver ... £2 12s. 6d. to 20 0
Ditto, in white metal, well calculated for warm climates ........
Drawing instruments of every description, single, or in sets, in brass, silver, or white metal Folding compass, with ink and pencil points, forming a complete portable case of drawing instruments . . . . . . £1 to 1 15
Ditto, ditto, in white metal . . £1 18s. to 2 15
Ditto, ditto, in silver . . £2 12s. 6d. to 3 3
Ebony and ivory parallel rules, of all lengths, 2s. to 1 0
Ivory and box folding pocket rules . . 2s. to 0 18
Proportionable compasses . . £l 10s. to 3 3
Elliptical, triangular, and hair compasses, various prices . . .....
Perspective compasses . . . £1 6s. to 3 13
Hadley’s quadrant, with nonius and ivory arch
.£2 12s. 6d. to 3 13
Brass sextants, with every improvement . £6 6s. to 18 18 Small pocket box sextants, with dark glasses, telescope, &c. .... £3 10s. to 5 15
Katers’ azimuth compass, 3-inch . . . .44
Ditto, ditto, 4-inch , . . . . ..55
Schmalcalder’s ditto . , . . £3 3s. to 4 14
Staff for ditto . . . . . . .33
Common ditto . . . . . . .111
d.
0
0
0
6
0
0
0
0
0
0
0
0
0
6
6
0
6
0
0
6
0
6