3 Ferri Arsenas. Dose, 1/16-1/4 grs.; 4-16 mgms. 



Ferrous Arsenate, Fe 3 (AsO 4 ) 2 , 6H 2 O. mixed with some ferric arsenate 

 and oxide. An amorphous, tasteless, greenish powder. Insoluble in 

 water, readily in hydrochloric acid. 



3 Ferric Carbonas Saccharatus. Dose, 10-30 grs.; K-2 gms. 

 Ferrous Oxycarbonate, xFeCo 3 , yFe (OH) 2 , more or less oxidised and mixed 

 with sugar. Brownish-grey lumps or powder, with a sweetish chalybeate 

 taste, of which Iron Carbonate forms about 1/3. Only partly soluble in 

 water, soluble in hydrochloric acid. 



3 Ferri Phosphas. Dose, 5-10 grs. 3-6 dgms. 



Ferrous phosphate Fe 3 (PO 4 ) 2 , 8H 2 O, (47%) mixed with ferric phosphate 

 and oxide. A slate-blue amorphous powder. Insoluble in water, soluble 

 in hydrochloric acid. 



1 Ferri Sulphas. Dose, 1-5 grs.; ^2-3 dgms. 



Ferrous sulphate, FeSO 4 , 7H 2 O. Pale blue-green crystals with an astrin- 

 gent taste. Soluble 1 in 1> of water, insoluble in alcohol. 



x Mistura Ferri Composita. (Griffith's Mixture.) Dose, l /4-l 

 fl.oz. 15-30 c.c. 



0.57; Potassium Carbonate, 0.686; Myrrh, 1.37; Sugar, 1.37; Spirit of 

 Nutmeg, 1.04; Rose Water, to 100. A dark-green mixture containing 

 a precipitate of ferrous carbonate. 



1 Ferri Sulphas Exsiccatus. Dose, ^-3 grs.; 1/4-2 dgms. 

 Ferrous sulphate from which six molecules of water have been removed 

 by heat. A white powder slowly soluble in a little more than 2 parts of 

 water. 



iPilula Ferri. (Blaud's Pill.) Dose, 5-15 grs.; 3-10 dgms. 

 (In 1-3 pills). 



30; Exsiccated Sodium Carbonate, 19; Gum Acacia, 10; Tragacanth, 3? 

 Syrup, 30; Glycerin, 2; Water q.s. Each pill contains about 1 gr. of Fer- 

 rous Carbonate. 



2 Ferrum Redactum. Reduced Iron. Dose, 1-5 grs.; >2-3 dgms. 

 A fine greyish-powder, strongly attracted by the magnet, producing black 

 streaks if rubbed in the mortar. Contains at least 75% of iron, the rest being 

 oxide. Incompatibles, salts of lead, silver, copper, bismuth, mercury and 

 antimony: may explode if rubbed with potassium permanganate and chlo- 

 rate. 



3 Trochiscus Ferri Redacti. 1 gr. with the Simple Basis. 



iFerrum Tartaratum. Dose, 5-10 grs.; 3-6 dgms. 



Garnet scales sweetish and astringent. Slowly soluble 1 in 1 of water, 

 sparingly in alcohol. 



^erri et Ammonii Citras. Dose, 5-10 grs.; 3-6 dgms. 

 A mixture of ferric citrate and ammonium citrate. Deep red, trans- 



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