186 EXPERIMENT STATION RECORD. 



alcohol and a sufficient quantity of hot diluted sulphuric acid (temperature 90-100° 

 C. and sp. gr. 1.5) to fill the test bottle to the upper part of the graduated neck are 

 added. The samples are whirled 3 minutes and the reading taken. Only one whirl- 

 ing is required. Determinations made by this method agreed closely with those 

 made by the GerV)er test and the Adams gravimetric method. 



The relation between specific gravity, fat, and solids-not-fat in milk, N. 

 Leonard {Analyst, 25 [1900), Mar., pp. 67-69).— The author worked out the average 

 error in the calculation according to a formula, and found that the error varied with 

 the season. 



On the payment for milk according: to the content of solids, H. Schrott 

 {Milch Zfg., 29 {1900), No. 5, pp. 68-7 1) .—This, subject is discussed at some length. 



Bitter milk for infants, Uhl and 0. Henzold {Milch Ztg., 29 {1900), No. 5, pp. 65, 

 66,Ji(j. 1). — The cause of a bitter taste in samples of prepared milk from 2 factories 

 was traced to a sjiecies of Clostridium present in the milk sugar which was added in 

 the process of manufacture. The bacterium is illustrated and described. It was not 

 found in a sample of milk sugar containing no all)uminous substances. 



Notes on the control of the manufacture of butter {Bcl(/. Horl. et Agr., 12 

 {1900), No. 2, pp. 28, 29). 



Some contributions on the rancidity of butter, J. Hanus {Ztschr. Unler.ntch. 

 Nahr. II. Geiius.^infL, 3 {1900), No. 5, j)p. 324-328). 



Stilton cheese making, M. Benson {Agr. Jour, and Min. Rec, 2 {1900), No. 24 

 pp. 749-754)- 



VETERINARY SCIENCE AND PRACTICE. 



Immunization against Texas fever by blood inoculation, W. H. 

 Dalrymple, W. R. Dodson, and H. A. Morgan {Louisiana Stas. Bid. 

 57, 3. se?\,2)p. l]^3-18o,fi(ji<. 6). — In experiments in blood inoculation, 

 9 susceptible heifers were divided into 3 groups and each group was 

 inoculated with the blood of a diti'erent animal. The animals from 

 which blood was taken for inoculation were an immunized steer from 

 north of the quarantine line, a native animal, and a Jersey calf born 

 on the college grounds. Five cubic centimeters of blood from these 

 animals was inoculated into each of the 9 animals to be immunized. 

 The blood from the Jerse}^ calf produced fever in the 3 heifers into 

 which it was inoculated and caused a decrease in the number of blood 

 corpuscles. The 3 heifers were afterwards exposed to natural infesta- 

 tion Avith ticks without developing acute cases of Texas fever. The 

 other 2 animals from which blood was taken for inoculation were 

 believed to have recovered from more severe attacks of Texas fever 

 and to possess, therefore, blood of greater immunizing power. The 

 3 heifers which were inocidated with blood from the native animal 

 developed high temperatures and showed a decrease in the number of 

 blood corpuscles, as usual under such conditions. During the inocula- 

 tion fever, one of the animals was attacked by 2 healthy animals and 

 died as a result. Similar results were obtained from the blood of the 

 immune Northern steer. It was observed, however, that the blood of 

 this steer was less virulent than that of the native steer, but that its 

 immunizing properties were fully as satisfactorj\ Two Herefords 



