CHAPTER III. CHEMICALS.

Bromine and its Compounds--Iodine and its Compounds--Chlorine and its compounds--Cyanide of Potassium--Hyposulphite of Soda--Hyposulphite of Gold--Nitric Acid--Nitro-Muriatic Acid--Hydrochloric Acid--Hydrofluoric Acid--Sulphuric Acid--Accelerating Substances--Liquid Sensitives--Dry Sensitives, etc., etc.