88 DADDS VETERINARY MEDICINE AND SJRGERY. 



they keep but few animals, disease and death, except In cases of 

 accident or old age, are quite rare, but so soon as t'^-ey crowded 

 tlie same, sickness and death were the consequ-^ro^^. In view of 

 supporting this theory, we may be permitted ic remark that ship 

 and jail fevers may be manuflictured ad W/)lv.p, ?.t any time when 

 a large number of persons are congrep;jVd together in a given 

 space, no provision having been mad^ nr the admission of j)ure 

 air. The unfortunate prisoners in ^^^ Black Hole of Ca;c-jtta 

 are an example, and the mortalitv jcc-irring on board oj'. ':mi- 

 grant ships furnishes another illuviVation. 



A numbci of horses were once shipped from Englp.nd V Spain, 

 and on the passage, a violent gale arising, it becamp rcjcessary tc 

 batten down the hatchway. The consequence was that most of 

 them ultimately died of either glanders or fa^rcy. We contenc', 

 therefore, that the active or morbid germ of disease enters the 

 living citadel through the pulmonary tissue ib an insidious mar-- 

 ner, and, therefore, much oftener than the generality of men 

 would be likely to realize. Therefore, it is a matter of vital im- 

 portance that attention be paid to the ventilation of our stablevj. 

 If proper sanitary regulations were established, and fully carried 

 out in all our stables, glanders and other infectious diseases woul 1 

 be exceedingly rare. They are so among horses free from the 

 control of man, whose stalls are broad as from ocean to oceai , 

 their height ranging from earth to regions above, the space pei ■ 

 vaded by a pure atmosphere concocted by the Great Chemist, i)ui e 

 as the pearly drops and refreshing as the morning zephyr. 1 1 

 such locations death has no terrors nor disease any victims. 



Brief Exposition of the Function of the Lungs. 



The principal function of the lungs is to arterial ize or decar 

 bonize the blood; that is, purify it. This arterialization of the 

 blood, which.goes the rounds of the circulation, is more essential 

 to life than either food or water ; for men and animals can exist 

 for several days, perhaps for two weeks, without food, yet the 

 same can not live over a few seconds unless supplied with a suffi- 

 ciencv of ahmosnhpric air. Hence, in a ponular sense, pure air is 

 the " creath of life." 



The functional acts of respiration are necessarily divided into 

 two parts ■ and in ca+tle the number of respirations are about 



