ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 431 



inflammation of the intestine with copious shedding of epithelium, small 

 spleen, &c. Hence the mode of infection by V. Metschnikovi becomes 

 interesting, as throwing light on th(i infection of cholera asiatica. With 

 regard to the latter, one of the chief objections to the cholera-vibrio 

 of Koch is that gastric juice soon and completely destroys it. Hence the 

 aetiology of Asiatic cholera is far from being explained by the discovery 

 of the comma bacillus. 



With regard to this new cholera of fowls, it is found that it is not 

 contagious, and that intramuscular and subcutaneous injections are 

 quite useless to infect adult fowls. Hence this cannot be the natural 

 mode of infection, nor was there any marked result from feeding the 

 animals with infected food. 



As the mortality from this disease amounts to 10 per cent., a more 

 effective method was evidently required. This was found in lung 

 infection ; for when fowls and rabbits were infected by injecting them 

 in the trachea or the lungs, they rapidly succumbed. The author is led 

 to conclude that it is probable that the natural mode of infection is 

 through the air-passages. 



