2 Mucilago Amyli. Mucilage of Starch, Starch 1.5; Water, to 100. 



Parahydroxyphenylethylamine. (Dose 20 mgms.) soluble in 

 water, probably an important active constituent of preparation of ergot. 

 (Trade name Tyramine.) 



PELLETIERIN.E TANNAS. PELLETIERINE TANNATE. Dose, 5-8 grs. . 

 3-5 dgms. 



The tannate of an alkaloid obtained from the root-bark of pomegranate, 

 Punica Granatum. A light yellow amorphous powder, greyish-white, 

 odourless, with an astringent taste and an acid reaction. Soluble 1 in 700 

 of water, 1 in 80 of alcohol. 



Phenolphthaleinum. Phenolphthalein. Dose, 1-8 grs.; ^-5 

 dgms. 



A white or almost white amorphous or crystalline powder, odourless. 

 Soluble 1 in 800 of water, 1 in 10 of alcohol. Trade names are many 

 e.g. Laxans, Laxoin, Laxophen, Probilin, Purgen, etc. 



STRONTII BROMIDUM. STRONTIUM BROMIDE. Dose, 5-30 grs.; 

 X-2 gms. 



SrBr 2 , 6H 2 O. Colourless transparent odourless crystals, deliquescent, 

 and with a strong bitter saline metallic taste. Soluble 2 in 1 of water, 

 1 in 3 of alcohol. 



SERUM ANTIDIPHTHERICUM. ANTIDIPHTHERIC SER- 

 UM. (Diphtheria Antitoxine.) Dose, as a prophylactic, 500 units; as a 

 curative agent, 2,000-4,000 units or more. 



A unit is the quantity of antitoxine necessary to prevent the death of a 

 guinea-pig weighing 250 grammes when injected with 100 lethal doses 

 of diphtheria toxin. The serum is the blood-serum of horses immunised 

 by the injection at stated intervals with diphtheria toxin in amounts at 

 first sublethal but finally many times the lethal dose. The blood is drawn 

 from the horse under the most careful aseptic precautions, is allowed to 

 clot, the serum removed and set aside for several weeks during which time a 

 precipitate forms which is filtered off. The serum is now put up in suitable 

 containers, usually with the addition of some antiseptic, such as phenol or 

 cresol. Its antitoxic power is tested previous to its being placed in the 

 containers and into each of these latter is put a definite number of units. 

 The number of units and the date of the preparation of the serum must be 

 placed on a label upon each container. The serum decreases in activity 

 with age, losing 10-30% per annum. A dried serum is also prepared. 



SERUM ANTITETANICUM. ANTITETANIC SERUM. (Teta- 

 nus Antitoxin.) This is similarly prepared to the antidiphtheric serum, 

 the horses being injected with tetanus toxin. 



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