698 EXPERIMENT STATION RECORD. 



the colostral milk of cows when treated with formaldehyde formed a uniform firm 

 mass. This reaction was made use of in producing an antiseptic salve in a conven- 

 ient and cheap form. The author found that by adding formaldehyde to colostral 

 milk, a firm and effective antiseptic salve could be produced and good results were 

 obtained from its use in the treatment of wounds. 

 Tuberculosis of animals in some of its relations to human tuberculosis, 



D. E. ^ALJioN ( r. S. Dept. Agr., Bureau of Avimul Iiuhisfnj Rpt. 1901, pp. 257-^206). — 

 Notes are given on the prevalence of tuberculosis in various parts of the United 

 Svates as shown by statistics obtained from tuberculin tests. These tests have been 

 reported in sufficient numbers to form a fairly reliable basis as to the percentage of 

 tuberculous animals. Special attention is given to a discussion of the presence of 

 this disease in dairy herds and hogs. During recent years tuberculosis has increased 

 in extent in cattle and hogs in this and other countries. The author believes, there- 

 fore, that great care should be exercised in keeping the human food supply as free 

 as possible from contamination with the tubercle bacillus. On account of the large 

 number of tuberculous beef animals which are slaughtered and the relatively larger 

 numl)er of tuberculous cows the milk of which is used as food, special precaution in 

 this direction is believed to be highly desirable. Notes are given on a numl)er of 

 cases related in the literature of this subject concerning apparent transmission of 

 tuberculosis from animals to man. 



Virulence of the bovine tuberculosis bacillus for monkeys and the effect 

 of tuberculins made from tuberculosis bacilli derived from different animals, 



E. A. DE ScHWEiNiTz and E. C. Schroeder ( IJ. S. Dept. Agr., Bureau of Animal 

 Industry Rpt. 1901, pp. 679-582). — An African baboon inoculated with 1 cc. of a 

 bovine tubercle culture died of generalized tuberculosis. An American ring-tail 

 monkey was fatally infected from an injection of \ cc. of the same culture. Compara- 

 tive tests were made of bovine and human tubercle cultures on baboons and rhesus. 

 In every case the animals died of generalized tuberculosis:. The authors report a 

 number of observations which indicate that tuberculous animals respond to tuber- 

 culin test without regard to the source of the cultures from which the tuberculin is 

 made. The experiments as a whole are believed to indicate the great virulence of 

 bovine tubercle bacilli for man. 



Composition of tubercle bacilli derived from various animals, E. A. de 

 ScHWEixiTZ and IM. Dorset {CenthJ. Bait. u. Far., 1. Aht., 32 {1902), No. 3, Orig.,pp. 

 186-192) . — -A report is made on the investigations of the authors with regard to the 

 composition of tubercle bacilli. The material upon which these investigations were 

 made consisted of attenuated bacilli of human origin, virulent bacilli of human origin, 

 virulent bacilli from cattle, hogs, horses, and birds. During the authors' investiga- 

 tions it was found that the highest percentage of ether extract was obtained from the 

 attenuated bacilli of human origin, the other bacilli being arranged in this regard in 

 the following order: Bacilli from the horse, virulent human bacilli, and bacilli from 

 cattle, birds, and -hogs. The results obtained indicate clearly that there is a differ- 

 ence in the composition of tubercle bacilli from different sources, perhaps equally as 

 great as the difference in morphology. It appears also that there is a relationship 

 between tubercle bacilli from different sources and that the degree <>f virulence may 

 be connected with (juite remarkable differences in composition. 



Note on branched forms of tubercle bacilli found in cultures, j\I. Dorset 

 {U. S. Dept. Agr., Bureau of Animal Bulmtry R]>t. 1901, pp. 572, 573, Jig. 1).—X brief 

 account is given of a number of branched forms of tubercle bacilli, and these are 

 arranged in the order which is believed to represent the sequence in the process of 

 branching. A species of streptothrix was found in the same culture and the attempt 

 has been made to determine what infiuence the presence of this organism had upon 

 the branching of the tul^ercle bacillus. 



Agglutination of the tubercle bacilli and treatment of tuberculosis with 

 the new tuberculin of Koch (bacterial emulsion), F. Tiiellung {('eiillil. Halt. 



