ARSENIC 271 



ing, and blemishing, and is consequently unsuitable either 

 for horses or dogs. For cattle, however, it is sometimes 

 applied in chest diseases and chronic rheumatism. Unlike 

 cantharides, it does not irritate the kidneys ; but if it be 

 absorbed, it produces in dogs, cats, and pigs nauseating 

 effects similar to those which follow its administration by 

 the mouth. 



DOSES, etc. When given to horses or cattle with the 

 view of producing sedative, alterative, or expectorant effects, 

 3i. to 3i v - are administered three or four times daily, in 

 either bolus or solution. It may be conjoined with nitre, 

 camphor, Epsom salt, calomel, or aloes. As an emetic for 

 dogs or cats, gr. i. to grs. iv., and for pigs, grs. iv. to grs. x. 

 are given in bolus, rolled in a piece of meat, or dissolved in 

 hot water. Doses considerably less than one grain, con- 

 joined with ipecacuanha, have been .prescribed for carnivora 

 as antipyretics and expectorants in acute attacks of bron- 

 chitis and pneumomia. 



Externally it is occasionally used in the form of saturated 

 watery solution or of ointment, which is made with one 

 part of tartar emetic and four of lard. The ointment is 

 sometimes added to ordinary blisters to increase their 

 activity. Antimonial wine, prepared by dissolving forty 

 grains tartar emetic in an ounce of distilled water, and 

 adding sufficient sherry to form twenty ounces, is seldom 

 used in veterinary practice. Doses. Dogs, H\v. to IT^lx. 



ARSENIC 



ACIDUM ABSENIOSUM. AESENICTJM ALBUM. Arsenious An- 

 hydride. Arsenium. As 4 O 6 . 



Arsenic is obtained by roasting certain arsenical ores. 

 The crude arsenious anhydride is conducted into condensing 

 chambers, and purified by sublimation. 



PROPERTIES. The anhydride or white arsenic, used in 

 medicine, as well as in the manufacture of glass, colours, 

 and shot, occurs as a heavy white powder, consisting of 

 minute glassy fragments and octahedral crystals. It is 

 odourless and tasteless, rough and gritty between the teeth, 



