PNEUMATICS.
21
MAGNETISM.
£
Bar magnets, single and in sets . . 2s. 6d. to 6
Horse shoe ditto . . . . . Is. to 1
Ditto, combined . . . . . £1 to 5
Needles, mounted on brass stands, with agate centres, for mineralogical purposes . . .0
Mining and surveying compases, variously mounted
. . . . . . . 3s. 6d. to 2
Pocket compasses, in metal gilt cases, without stop
. . . . . . . 7s. to 0
Ditto, with agate centres and stop . . 15s. to 2
Ditto, in silver cases, full divided . . £1 to 2
Ditto, with floating cards . . . 18s. to 3
Dipping needles, upon the most improved principles
. £1 10s. to 5
Box of magnetic apparatus, consisting of bar magnets, horse shoe ditto, iron balls, magnetometer, spinners, dipping needle, gymble compass, stands,
&c. for illustrating the properties of magnetism
.£7 7s. to 10
Magnetical swans, fish, &c. . . 2s. 6d. to 0
PNEUMATICS.
A large double barrelled air pump, with Smeaton’s,
for accurate exhaustion
.
63
The same, without Smeaton’s pump
.
38
Smeaton’s air pump
.
38
Large table ail pump
.
14
Same size, mounted on stand, with barometer gauge .
18
Small table air pump
.
8
Ditto, with a raised plate
.
10
Smaller ditto ....
.
5
Single barrel air pump .
£1 10s. to
5
Exhausting syringes
. 14s. to
1
s. d. 6 0 0 0 0 0
7 6
10 0
15 0
0 0 10 0 0 0
5 6
10 0 7 0
0 0 0 0 0 0 0 0 18 0 0 0 10 0 0 0 0 0 10 0