CHEMISTRY.
13
£ s. d
Safety lamp, with apparatus for exhibiting its safety
in the mine . . . . £1 10s. to 2 10 0
Wire gauze, in pieces, for experiments on flame, 6d. to 0 5 0
Cylinders, of metal and wood, for shewing the different conducting powers of those bodies . .070
Sets of metallic rods, for the same . . Is. to 0 10 0
A set of cones and copper boiler, for ditto . .220
Pyrometers, for shewing the expansion of metals
. . . . . . £3 10s. to 8 8 0
Brass bar, with hole and gauge, for proving that metals expand in every direction . . .076
Bar of brass and iron, for demonstrating the unequal
expansion of those metals . . . .076
Set of globes, with long necks, filled with equal bulks of water, ether, oil, alcohol, and mercury, mounted in a frame, for shewing the unequal expansion of liquids . . £1 10s. to 2 10 0
Glass balls, with necks, filled and unfilled, for the
process of thermometer making , 6d. to 0 2 6
Dr. Marcet’s apparatus, for shewing the expansion of
water below 40° . . . . . .110 0
Glass apparatus, for shewing the heat evolved, and diminution of bulk, upon mixing equal quantities of water and sulphuric acid, or water and alcohol . . . . . . .070
Tin parabolic reflectors, on stands, for experiments on
radiant heat, the pair .....
2
10
0
Tinned copper ditto, 24 inches in diameter, with
stands, &c. complete .....
9
9
0
Stands for heated iron ball, gunpowder, &c. . 10s. to
0
15
0
Air thermometer, for mirrors .....
0
4
6
Sanctorio’s thermometer .....
0
7
6
Differential thermometer .....
0
15
0
Black and bright vessels, for radiant heat
0
10
0
Hero’s engine, in glass or metal . . 7s. 6d. to
1
10
0