296 PBINOIPLES OF VETEKINAET STJBGEKT 



after wMch ttey are treated as other burns. Internally, stim- 

 nlants are of value. 



How do you treat burns due to lightning and strong electric: 

 currents ? 



The treatment of wounds due to lightning and strong cur- 

 rents, as they are occasionally seen in the larger cities when 

 the overhead wires of an electric car system break, are. 

 treated in the same way as other hums. The paralyses fol- 

 lowing these electric strokes usually terminate favorably. 



Frost Bite (Congelatio). 



Jjs the detrimental action of excessive cold in animals com'- 

 mon ? 

 It is not. Freezing to death, on the whole, is rare; partial 

 freezing is quite frequent, especially those parts devoid of a. 

 well-developed, hairy dress, as the scrotum in bulls and the- 

 coronary region and hollow of the heel in horses' ears and tails 

 of pigs. 



How does the hairy coat of animals protect against frost bites f 

 Dry hair folded against the body surface is a poor con- 

 ductor of heat ; at the same time, between the hair and the- 

 skin air spaces are formed which prevent the radiation of the- 

 body heat. All this is changed as soon as the hair becomes- 

 wet from slush or snow. At this moment the air spaces 

 formed by the dry air are done away with and the radiation 

 of the body heat is no longer prevented, but rather encour- 

 aged. Consequently the vitality of such a part is lowered, 

 and the whole body temperature lowered. Nevertheless, the- 

 lay of the hair and the greasy state of the skin — made so by~ 

 the product of the sebaceous glands — strongly protect the* 



