VETERINARY SCIENCE AND PRACTICE. 389 



On iodin fat and its b3havior in the body, H. Wixternitz (Ztschr. Pin/viol. 

 Chem., 24 (1S9S), Xo. 5-6, pp. 425-448): — Among other things experiments are reported 

 with goats on the transmission of iodin fat in the food to the milk of the animal. 

 When iodin fat was fed it was detected in the milk, being absorbed by the milk fat. 



Asses' milk as a substitute for human milk, A. Schlossmann ( Abs. in Milch Ztg., 

 27 (1S9S), Xo. 25, p. 393). — The variations in asses' milk, the relative proportions of 

 its constituents as compared with human milk, and the nutrition of the child with 

 asses' milk are considered. 



The conditions of the production of richer milk, A. Kraemer (Milch Ztg., .'? 

 (1S9S), Xo. 26, pp. 402-404). — A concise summary of the results of investigations re- 

 lating to the effect of feeding and management on the yield and composition of milk. 



Bacteriology in the dairy, E. VON Freudenreicii (Jena: Gustav Fischer, 1S9S). — 

 This is a short popular treatise on this subject for the use of dairy schools, cheese 

 makers, and farmers. The book is very favorably mentioned in Milch Zeitung, 27 

 (1898), No. 24, p. 378). 



VETERINARY SCIENCE AND PRACTICE. 



Cattle tick and Texas fever, W. H. Dalrymple, S. B. Staples, 

 H. A. Morgan, and W. II. Dodson (Louisiana Stas. Bui. 51, 2. ser.,pp. 

 230-282, pis. 5, figs. 2). — The widespread dissemination of Texas fever 

 is pointed ont and the symptoms of the disease are described in detail. 



"A summary of the more diagnostic characters to be looked for when Texas fever 

 is suspected would include: 



"(1) Cattle ticks; (2) hemoglobinuria, enlarged spleen, enlarged yellowish liver, 

 thick flaky bile, extravasations on the outer and inner surface of the heart, and (3) 

 reduction in the number of red corpuscles, thinness of the blood, and the tardiness 

 with which it exudes from an incision." 



The life history of the southern cattle tick is discussed at some length 

 and a number of experiments on the condition of development of the 

 tick and on the efficacy of serum treatment for cattle are reported. 

 Following is the authors' summary : 



"The development of the cattle tick is less rapid in winter than in summer. The 

 period of incubation is influenced by cold, and egg fertility is destroyed by direct 

 sunlight. Seed ticks are capable of living a considerable length of time without 

 food; this period is less in summer than in winter. Seed ticks may endure cold 

 down to 16° F., below which death takes place. The parasitic period of develop- 

 ment of the tick is very much longer in winter than in summer. The cattle tick 

 remains attached to animals from the seed-tick stage to adult condition; if removed 

 from its host during this parasitic period it soon perishes. The adult female tick is 

 more easily destroyed by rainfall and cold than any of the other stages. The con- 

 ditions lessening the number of broods per season also aid hibernation. Clean 

 pastures materially aid disinfection. Ticks will not exist upon alluvial pastures 

 unless the pastures are constantly being reinfected by the importation of highland 

 cattle. Pastures may be disinfected by removing all cattle from them for at least one 

 year, as would be the case in a system of rotation of crops. Ticks may be removed 

 from animals by the use of mineral oil, applied either with a sponge or rag, or by 

 plunging animals into a vat containing water upon the surface of which floats a thin 

 layer of oil. Herds may be improved by keeping an imported stock bull in a small 

 disinfected pasture or in a stable, The offspring of this animal will either possess 

 immunity from birth or acquire it very young. The injection of 2 cc. of serum for 

 S192— Xo. 4 7 



