MATERIA MEDICA AND THERAPEUTICS. 1 25 



tinctura catechu composita — Compound Tr. of Catechu. 

 — Composed of catechu (10%), cinnamon and diluted alcohol. 



Dose. — Horse, y 2 to 2 ozs. ; lambs, 10 to 30 ms. ; dogs, 30 

 to 60 ms. ; sheep and pigs, y 2 to 1 oz. ; calves and foals, y 2 to 1 oz. 



These doses are sometimes considerably increased, and are 

 very good in diarrhoea of small and young animals. 



KINO — Tinctura Kino. — Dose double that of catechu, also 

 very nice in small and young animals. 



QUBRCUS ALBA— White Oak Bark.— There is no official 

 preparation of- white oak bark. 



decoctum quercus albae. — Decoction of white oak bark 

 (not official), made by using 1 oz. to 1 pt. 



Dose. — Colt, y 2 to 2 ozs. ; Cattle, 1 pt. ; sheep and pigs, 2 to 

 8 drs. ; horses, 4 to 8 ozs. ; calves, y 2 to 3 ozs. ; lambs, 1 to 4 drs. 

 These doses may be doubled and tripled; used in diarrhoea. 

 Tannic acid or catechu are preferable. 



HAM AM BUS— (leaves) Witch Hazel. 



Extractum hamameeidis Eluidum — Fluid Extract of Witch 

 Hazel. 



Dose for dogs of Fluid Extract, y 2 to 2 drs. Mostly used 

 as a household remedy for human beings. Occasionally used in-^ 

 ternally and locally to check hemorrhage. 



Antagonists and Incompatibles. — Of tannic and gallic acids 

 and substances containing them, the mineral acids, salts of an- 

 timony, lead and silver and the persalts of iron and alkalies are 

 chemically incompatible. The vegetable alkaloids and gelatin 

 form insoluble precipitates. 



Synergists. — Tonics and bitters as" a rule favor the action of 

 tannic and gallic acids and the substances containing them. 



Physiological Actions. — Astringency is their chief action, 

 tannic acid is more powerful than gallic acid ; it precipitates pep- 

 sin coagulates albumen, impairs digestion, stops peristalsis and 

 causes constipation; it is the best antidote for poisoning by the 

 alkaloids as it forms insoluble tannates. 



Uses. — Wherever a powerful astringent is indicated; in 

 diarrhoea, tannic acid with opium and sub-nitrate of bismuth ; in 



