VETERINARY SCIENCE AND PRACTICE. 919 



Butter, by H. E. Alvord, in which standards for butter are discussed; and Bacteria 

 in Milk Supplies for City and Factory I'se, by II. L. Russell, dealing with the sani- 

 tary production of milk. 



Legislation relative to the milk trade (Rev. Soc. Sci. Hyg. Aliment., I (1904), 

 No. 3, pp. 219 -252): -A summary of regulations regarding the sale of milk in Germany, 

 Belgium, France, Italy, Switzerland, England, Denmark, and the United States. 



VETERINARY SCIENCE AND PRACTICE. 



Atlas ^nd epitome of general pathologic histology, 11. DiJRCK | Philadelphia: 

 W. B. Saunders <i- Co., 1904, pp. 371, pis. 80, figs. 56).— This is a translation from the 

 German edition and is edited by L. Hektoen. The purpose of the volume is to 

 present a general discussion of pathologic histology, with full details concerning the 



nature and histology of different morbid growths. The material discussed in the 

 volume is classified under the subjects of circulatory disturbances, atrophy, retro- 

 gressive metamorphoses, reparative processes, and tumors. 



The problem of agglutination and particularly the role of bacterial fla- 

 gella, G. de Rossi (Centbl. Hold. u. Par., 1. AbL, Orig., 36 ( 1904), No. 5, pp. 685-691; 

 37 (1904), No. 1, pp. 107-115, figs. 3). — The experiments reported in this paper were 

 chiefly concerned in determining the modification of the flagella due to agglutination 

 and the phenomena of agglutination following upon the inoculation of experimental 

 animals with bacterial bodies or with bacterial flagella of the same species. 



The organism used in this experiment was Bacillus snliiUix. Apparently there is 

 no visible modification of structure, arrangement, or number of the flagella which 

 can be attributed to the phenomenon of agglutination. The flagella play the most 

 important role in fixing the agglutinin. The bacterial bodies are of less impor- 

 tance in this respect. The more conspicuous manner in which the phenomenon of 

 agglutination takes place in the case of motile bacteria finds its explanation in the 

 great sensitiveness of flagella toward the agglutinating substances of specific sera. 



Specific fixation of agglutinins in absorption experiments, F. Ballner and 

 R. von Saoasser (Arch. Jli/i/., 51 (1904), No. 3, pp. 266-280). — Numerous experi- 

 ments were carried on by the authors, chiefly for the purpose of determining certain 

 points in the agglutination of coli bacillus, typhoid bacillus, and other pathogenic 

 bacteria. 



The authors were unable to find a satisfactory explanation of the nature of the 

 fixation which takes place with regard to agglutinins under certain conditions. 

 Whether this process is of a physical or chemical nature is still undetermined, but 

 the weight of evidence is believed by the authors to be in favor of considering it a 

 chemical process, 



The relation between precipitins and agglutinins of bacteria, R. Kraus and 

 J.Joachim (Centbl. Bakt. u. Par., l. AbL, Orig.., 36 (1904), No. 5, i>i>. 662-671; 37 

 (1904), No. I, ])/>. ?,!-79).—A general discussion is presented of the problem of 

 immunization by means of bacteria and bacterial filtrates, whether treated or not 

 with heat. 



As a result of their investigations the authors conclude that there are L' substances 

 which produce agglutinins and 2 distinct agglutinins. The latter may be produced 

 by bacteria and also by bacterial filtrates. The formation of the agglutinin may take 

 place in connection with an agglutinogenous substance deprived of its eoagulable 

 group of bodies. The authors' experiments apparently support the theory of the 

 identity of agglutinins and precipitins. 



The influence of temperature upon specific and nonspecific agglutination, 

 E. Weil ( Centbl. Bakt. n. I'm:, 1. Abt., Orig., 36 ( 1904), X". 5, /,,,. 077-684; 37 (1904), 

 No. 1, pp. 98-107). — The experiments reported in this paper were largely confined 

 to a study of the typhoid bacillus. 



