Hydrargyri Benzoas

White crystals, easily soluble in sodium-chloride and ammonium-benzoate solutions. Dose:1/30 to 1/10 grain, in pill; subcutaneously, 15 minims of solution containing the benzoate 3 grains, sodium chloride 3 grains, and water I ounce.

Hydrargyri Bibromidum (mercuric). - Resembles corrosive sublimate. White scales, soluble in water. Dose: 1/30 to 1/10 grain, in pill; externally, 4 grains per ounce of ointment.

Hydrargyri Bromidum (mercu-rous). - Resembles calomel. Insoluble in water. Dose:1 grain, increasing to 10 grains, per day.

Hydrargyri Cacodylas

White, hygroscopic crystals, soluble in water and alcohol. Dose:1/6 grain, subcutaneously.

Hydrargyri Carbolas

A greyish-white to red-grey powder, soluble in ether. Dose: 1/6 to 1/3 grain, in pill.

Hydrargyri Cholas, or Mergal, has assigned to it the formula Hg(C24H3905)2, and is a yellowish-white powder, insoluble in water, but soluble in salt solution. For intermittent fever, in 10-grain doses with food.

Hydrargyri Diiodosalicylas

A yellow, amorphous powder, used for intramuscular injections, I to 9 of liquid paraffin.

Hydrargyri Gallas

A greyish-brown, amorphous powder, insoluble in water. Dose: 1/2 to 1 grain in pill with as much pulv. cinchonae and glycer. tragacanth.

Hydrargyri Glycocholas (amido-acetate). - Supplied in 1-per-cent. solution. Dose (subcutaneously) : 15 minims.

Hydrargyri Hermocarbolas (her-mophenyl). - A white, amorphous powder, containing 40 per cent. of Hg, 'obtained by dissolving the oxide of mercury in bisulphite of carbolic sodium. It has the formula C6H20(SO3Na)2.Hg.' Very soluble in water. Dose:10 to 30 grains, subcutaneously.

Hydrargyri Imido-Succinas

Mercurisuccinimide, a white, crystalline powder, soluble in water. Dose: 1/5 grain, subcutaneously.

Hydrargyri Lactas: A white, crystalline powder, sparingly soluble in water. Dose:1/5 grain, in pill or subcutaneously.

Hydrargyri Naphthol-Acetas

A yellowish powder, soluble in dilute alkalies. Dose: 1/2 to 1 grain.

Hydrargyri Beta-Naphtholas

A greyish-white powder, insoluble in water. Used in typhus. Dose: I grain.

Hydrargyri Oxycyanidum

A white or slightly yellowish, crystalline powder, soluble in hot water, sparingly in cold. A strong antiseptic in 1/2 to 2 per cent. solutions.

Hydrargyri Resorcino-Acetas

A yellowish, crystalline powder, insoluble in water and alcohol. Used subcutaneously only, the injection consisting of the salt 3j., liquid paraffin 3j., and anhydrous lanoline gr. xxiv. Dose of this, warmed to 8o° F., 15 minims.

Hydrargyri Salicylas

A white powder, soluble in dilute alkalies and saline solutions. Dose: 1/3 grain, in pill; ointment and dusting-powder, 1 per cent.; urethral injection, gr. j. to acacia mucilage 5iss. and water 3iiiss. (15 minims for an injection).