i8o Veterinary Medicine. 



befell the steamer Thanemore, Captain Sibthorp, of the William 

 Johnson & Co. line. This vessel left Baltimore with 565 cattle 

 on board, of which 228 perished by suffocation before she reached 

 Cape Henry. " 



Among animals that survive such treatment the susceptibility 

 to lung disease including even the contagious forms like tubercu- 

 losis is enormously enhanced. 



EFFECTS OF MODERATELY VITIATED AIR. 



"When air only moderately vitiated is breathed continuously 

 for a greater length of time the results are still very injurious, 

 and in the front rank of diseases so caused stand pulmonary con- 

 sumption, and other destructive affections of the lungs. Perhaps 

 no better example of this can be given than that of the monkey 

 houses of the Zoological Gardens of London and Paris. While 

 these houses were small and ill-ventilated the monkeys died in large 

 numbers from pulmonary consumption, but after they had been 

 enlarged and better ventilated the mortality from this cause nearly 

 ceased. (Arnott.) " 



' ' Town dairy cows which are packed in close ill-ventilated 

 buildings and never allowed to go out are very subject to consump- 

 tion, while horses kept in no better conditions, but spending nearly 

 half their time in the open air, rarely have phthisis. (With lung 

 plague it will be remembered that the out-door exercise and min- 

 gling of herds leads to an increase of the mortality.) Horses 

 newly stabled suffer severely from diseases of the Ipngs. The 

 same holds true of human beings. A long list of careful observ- 

 ers have noticed the essential connection of lack of ventilation and 

 pulmonary consumption. Baudelacque, Carmichael, Arnott, I,e- 

 pelletier, Allison, Sir James Clark, Toyubee, Guy, Greenhow, 

 Sir Alexander Armstrong, Parkes, and Aitken have especially in- 

 si.sted upon consumption being a sequence of lack of ventilation. 

 Dr. Cormac indeed insists with great force that consumption is 

 originated by rebreathed air. 



' ' The notorious prevalence of consumption in sailors has been 

 directly traced to the impure air in which they sleep, and an ex- 

 tensive outbreak of lung disease (not tubercular), leading to 

 destruction of lung tissue, in the English Mediteranean squadron 



