Z.
- Zinc, [64]
Footnotes
[A] The degrees of temperature given in the text refer to the centigrade Thermometer; their equivalents on the Fahrenheit scale can be obtained by means of the formula:
9/5 C° + 32 = F°.
[B] The sulphur, usually accompanying the precipitate of sulphide of arsenic, is insoluble in ammonia.—Trans.
[C] The fusing of the point of the tube is also prevented by platinizing it. The tube is drawn out, its end roughened by filing, and then immersed in solution of bichloride of platinum, so that a drop or two of the fluid adheres. The point, upon heating, now acquires a fine metallic lustre, and by repeating the operation a few times a good coating of platinum is produced both on the exterior and interior of the tube.—Trans.
[D] The addition of a few drops of solution of bichloride of platinum to the mixture of zinc, water and sulphuric acid is advisable.—Trans.