Sulphuric Acid.--There are two sorts of this acid: one is an oily, fuming liquid; this is made in Nordhausen, in Saxony, and is commonly called "Nordhausen sulphuric acid," or oil of vitriol. The other which is the kind used in connection with the Daguerreotype, is common sulphuric acid. It is somewhat thinner, and when undiluted is not fuming. This acid may be obtained in a solid and dry state, called anhydrous sulphuric acid.英文原著 · 《American Hand Book of the Daguerreotype》
Bromine and its Compounds--Iodine and its Compounds-- Chlorine and its Compounds--Cyanide of Potassium-- Hyposulphite of Soda--Hyphosulphite of Gold--Nitric Acid-- Nitro-Muriatic Acid--Hydrochloric Acid--Hydrofluoric Acid-- Sulphuric Acid--Accelerating Substances--Liquid Sensitives-- Dry Sensitives, etc., etc., .英文原著 · 《American Hand Book of the Daguerreotype》
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.英文原著 · 《American Hand Book of the Daguerreotype》
The common sulphuric acid is made by burning sulphur, which forms sulphurous acid. To convert this into sulphuric acid and gain more oxygen, nitric acid, which is rich in that body, is added. It forms a limpid, colorless fluid, of a specific gravity of 1.8. It boils at 620 deg.; it freezes at 15 deg. It is acrid and caustic, and intensely acid in all its characters, even when largely diluted.英文原著 · 《American Hand Book of the Daguerreotype》
The nitric acid of commerce, is generally the article used by the Daguerreotypist. This usually contains some chlorine and sulphuric acid. It is obtained by the distillation of saltpetre with sulphuric acid. It is employed in the Daguerreotype process for dissolving silver, preparing chloride or oxide, nitrate of silver, [the former used in galvanizing,] and in combination with muriatic acid for preparing chloride of gold, used in gilding. It is also used by some for preparing the plate.英文原著 · 《American Hand Book of the Daguerreotype》
Nitro-Muriatic Acid.--Aqua Regia is a compound menstruum invented by the alchemists for dissolving gold. It is composed of colorless nitric acid (aqua-fortis) and ordinary muriatic acid; the mixture is yellow, and acquires the power of dissolving gold and platinum. These materials are not properly oxidized; it nearly causes their combination with chlorine, which is in the Muriatic acid.英文原著 · 《American Hand Book of the Daguerreotype》