28o Veterinary Medicine. 



Symptoms. Colicy pairis, purging, emesis in vomiting animals, 

 more or less tympany and rumbling of the bowels, and surface 

 coldness. 



Treatment. Give carbonates of the alkalies, magnesia or lime 

 to precipitate the comparatively insoluble carbonate or oxide ; or 

 tannic acid or infusion of oak bark or galls. White of egg, milk 

 and mucilaginous agents, and opium may be required to allay 

 irritation . 



POISONING BY CHROMIUM. 



Chromic acid, chromate and bichromate of potash. Corrosive. Cause : 

 Gastro-intestinal inflammation, albuminuria, hsematuria, emaciation, digital 

 ulcers and sloughs, colic. Diarrhoea, vertigo, stiffness, weakness, Lesions. 

 Treatment : Emesis, stomach pump, demulcents. 



Bichromate of pota.sh is used extensively in dyeing, calico 

 printing, in the manufacture of porcelain, in chemistry and 

 photography, and to a slight extent in medicine, while lead 

 chromate (chrome yellow) is a valuable pigment. Chromic acid 

 is one of the most potent caustics, at a moderately high tempera- 

 ture dissolving all animal products that may be subjected to it. 

 The chromate and bichromate of potash are only less violently 

 caustic, producing deep and fistulous sores on the hands of the 

 dyers, and acting in a similar manner on the mucosa of the 

 alimentary canal. Twenty-eight grains of the bichromate given 

 by the stomach killed a rabbit in two hours, while 45 grains of 

 the chromate had no such effect (Gmelin). Pelikan found that 

 the bichromate acted like arsenic or mercuric chloride, producing 

 violent irritation of the stomach and intestines, followed by 

 albuminuria, hsematuria and emaciation : i to 5j^ grains proved 

 fatal to rabbits and dogs. 



Workmen inhaling the bichromate dust, have inflammation, 

 ulceration and finally destruction of the na.sal septum, together 

 with skin eruptions and ulcerations. 



Horses working at the factories have intractable ulcers of the 

 skin and sometimes shed t,he hoofs (B. W. Richardson). 



Symptoms. Taken by the mouth the bichromate causes' colicy 



