VETERINARY MEDICINE. 85 



tion of a series of experiments deslsued to ascertain if tlie bacilli of avian 

 tuberculosis may be trausmitteil to mauuuals under suitable conditions. 



Two living hens obtained from I lie infected ranch produced tuberculosis in 

 tuberculin-tested pigs to which they were fed. Affected tissues from these 

 infected pigs were fed to healthy fowls and administered in various ways to 

 guinea pigs and rabbits in order to test their virulence for mammalia. Cul- 

 tures obtained from these inoculations proved to be avian in their biological 

 characteristics. 



Only 2 eggs were laid by the diseased hens during the 5 months following 

 their aiTival at the laboratory, which fact is' considered to have been due to 

 the unthrifty condition of the birds. " Microscopic examination of these eggs 

 failed to disclose the presence of tubercle bacilli, but the inoculation of guinea 

 pigs proved their presence. Several guinea pigs were inoculated with the 

 white of the egg and others with the yolk. Those which received inocula- 

 tions of the yolk failed to develoi) tuberculosis, but those which were injected 

 with the white, with one exception, developed very characteristic lesions 

 within a short period." 



Through these and other experiments with avian tubercle bacilli, it has 

 been proved that the micro-oi-ganisms of naturally acquired tuberculosis in 

 fowls can be made to lodge and multiply within the tissues of swine, cats, 

 rabbits, and guinea pigs. " Repeated passage of such avian tubercle bacilli 

 in large numbers from animal to animal will result in the final development 

 of a type of tubercle bacilli which will produce typical lesions of tuberculosis 

 in mammals." 



The causation and character of animal tuberculosis, and federal measures 

 for its repression, J. R. Moiiler ( [/. »S'. Dcpi. Agr., B)ir. Aiiim. Indus. Rpt. 

 J908, pp. 155-16-')). — This is a paper that was presented at the annual conven- 

 tion of the American Veterinary Medical Association in 190S in which the 

 various methods of tuberculous infection, a comparative study of tubercle 

 bacilli, relation to public health, prevalence, and the federal work in suppress- 

 ing the disease are considered. 



The economic importance of tuberculosis of food-producing- animals, 

 A. D. Melvin (U. /S'. Dept. Agr., Bur. Aiiim. Iiulus. Rpt. WOS, pi). 97-107).— 

 Previously noted from other sources (E. S. R., 21, p. 282; 22, p. 387). 



The relation of the tuberculous cow to public health, E. C. Schroedeb 

 (U. S. Dcpt. Agr., Bur. Aniin. Indu.^. Rpt. 190S, pp. 109-153, pis. 3, figs. 15).— 

 The subject is reviewed at some length, evidence gained through experimental 

 investigation being presented. The author discusses the character of tuber- 

 culosis as a disease of cattle, the manner in which tubercle bacilli are expelled 

 by tuberculous cattle, the appearance of cattle that expel tubercle bacilli, the 

 manner in which tubercle bacilli thus expelled get into milk and dairy products, 

 the virulence and vitality of tubercle bacilli in dairy products, proportion of 

 tuberculous cows among those in use for dairy purposes and the frequency with 

 which dairy products contain tubercle bacilli. 



Chronic bacterial dysentery of cattle, J. R. Mohler {U. S. Dcpt. Agr., Bur. 

 Anim. Indus., Circ. Llli. pp. 3, ]ig. 1). — A reprint of another portion of the 

 paper in the annual rei)ort of the bureau above noted. 



The morphology of the microbe of bovine pleuro-pneumonia, Bordet (Abs. 

 in Rev. G^n. MM. Vet., 15 (1910), No. 17.',. pp. 3',S, 3'i9; ^^ct. Rcc, 22 (1910), 

 Xo. 112-'i, p. 1,90). — The author finds the organisms first discovered in 1908 by 

 Nocard and Roux to be involution forms dei)endent upon the nature of the 

 culture media. " P.y special cultural methods, he has succeeded in including 

 these minute particles to develop into typical spirochistai, stainable by Giemsa's 



