The incompatibles of the salts of potassium do not depend upon the potassium, but upon the other radicals present and may hence be best found by looking up the incompatibilities of those radicles.

1Potassa Caustica. Potassium Hydroxide. (Hydrate, Caustic Potash.) Hard, white pencils or cakes, very deliquescent. Soluble, 2 in 1 of water, 1 in 2 of alcohol.

1Liquor Potassę. Dose, 10 - 30 min.; 0 6 - 2 c.c, freely diluted. - 6.19; Water, 100. A colourless odourless alkaline liquid.

3Potassa Sulphurata. Sulphurated Potash. (Liver of Sulphur.)

A mixture of the Salts of Sulphur, but chiefly Sulphides.

Potassii Acetas. Dose, 10 - 60 grs.; 6 - 40 dgms. Either in white foliaceous satiny masses or in granular particles, very deliquescent, alkaline in reaction. Soluble 1 in 1/2 of water, 1 in 2 of alcohol.

Potassii Bicarbonas. Dose, 5 - 30 grs.; 3 - 20 dgms. KHC03. Colourless crystals, with a feebly alkaline, saline taste. Soluble, 1 in 4 of water, insoluble in alcohol. 20 grs. neutralise 14 grs. of citric or 15 grs. of tartaric acid.

3Potassii Bichromas. Dose, 1/10 - 1/5 gr.; 6 - 12 mgms. K2Cr03, CrO3. Large orange-red transparent crystals. Soluble 1 in 10 of water.

1Potassii Bromidum. Dose, 5 - 30 grs.; 1/3 - 2 gms. KBr. Colourless, crystals, odourless, with a pungent saline taste. Soluble, 1 in 2 of water, 1 in 200 of alcohol.

1Potasssii Carbonas. Dose, 5 - 20 grs.; 3 - 12 dgms. K2CO3. A white crystalline powder, alkaline and caustic to the taste, very deliquescent. Soluble 1 in 1 of water, insoluble in alcohol.

Potassii Chloras. Dose, 5 - 15 grs.; 3 - 10 dgms. KClO3. Colourless crystals with a cool saline taste. Soluble 1 in 16 of cold, 1 in 3 of hot water, 1 in 1,700 of alcohol.

2trochiscus Potassii Chloratis

3 grs. with the Rose Basis.

1Potassii Citras. Dose, 10 - 40 grs.; 1/2 - 2 1/2 gms. C3H4.OH.(COOK)3. A white powder of a feebly acid saline taste, deliquescent. Soluble 1 in 0.6 of water, 1 in 2 of glycerin, 1 in 9 of alcohol 60%.

1Potassii Iodidum. Dose, 5 - 20 grs.; 3 - 12 dgms. KI. Colourless crystals with a pungent saline and subsequently bitter taste. Soluble, 1 in less than 1 of water, 1 in 10 of alcohol, 1 in 3 of glycerin.

3linimentum Potassii Iodidi Cum Sapone

10.125; Curd Soap, 13.5; Glycerin, 6.75; Oil of Lemon, 0.844; Water, 67.5.

3unguentum Potassii Iodidi

10; Potassium Carbonate, 0.6; Water, 9.4; Benzoated Lard, 80

1Potassii Nitras. (Nitre, Saltpetre.) Dose, 5 - 20 grs.; 3 - 12 dgms.

KNO3. White crystalline masses, colourless with a cool, saline taste. Soluble 1 in 4 of cold, 1 in 1/2 of hot water, sparingly soluble in alcohol.

1Potassii Permanganas. Dose, 1 - 3 grs.; 1/2 - 2 dgms. Dark purple slender iridescent crystals, with sweet astringent taste. Soluble 1 in 20 of cold, 1 in 3 of hot water.

3Liquor Potassii Permanganatis. Dose, 2 - 4 fl. dr.; 8 - 16 c.c - 1; Water, 100.

3Potassii Sulphas. Dose, 10 - 40 grs.; 1/2 - 2 1/2 gms. Colourless, hard crystals. Soluble 1 in 10 of cold, 1 in 4 of hot water, insoluble in alcohol.

3Potassii Tartras. Dose, 30 - 240 grs.; 2 - 16 gms. Normal potassium tartrate, (CHOH)2.(COOK)2, H20. Small, colourless crystals. Soluble 1 in 0.6 of water, insoluble in alcohol.

1Potassii Tartras Acidus. (Bitartrate, Purified Cream of Tartar.) Dose, 20 - 60 grs.; l 1/2 - 4 gms.

A white gritty powder, or fragments of cakes crystallised on one surface, with an acid taste. Soluble 1 in 200 of water, insoluble in alcohol.

Pruni Virginians Cortex. The bark of Prunus serotina. In curved pieces or irregular fragments about 1/12 inch thick. Taste astringent aromatic, and bitter; when macerated an odour of bitter almonds, due to the formation of hydrocyanic acid from the amygdalin under the action of the ferment, emulsin.

1Syrupus Pruni Virginianę. Dose, 30 - 60 min.; 2 - 4 c.c. A macerate and percolate of the bark in water to which sugar and glycerin are added.

3Tinctura Pruni Virginianę. Dose, 30 - 60 min.; 2 - 4 c.c. - 20; Alcohol, 62.5; Water, 37.5: by maceration.