488 EXPERIMENT STATION RECORD. 



hog cholera. 10 pigs were inoculated in this manner and after exposure 

 to the disease did not become sick until after the period of incubation, 

 and 1 animal showed complete immunity. 



During the experiments conducted at the station it was noted that 

 all etiorts to secure perfect disinfection of pens were unsuccessful. A 

 direct experiment was tried for the purpose of testing the disinfection 

 of the pens. A pen which had been used for inoculating purposes 

 was selected for this purpose. All refuse was swept up and burned 

 and the floors were thoroughly soaked and washed in a strong solution 

 of zenoleum, the walls and partitions being treated in like manner. 

 The floor was removed and all refuse found ])elow the floor was collected 

 and burned. The floor was then covered with a thick coating of air- 

 slaked lime. Two healthy pigs were placed in this pen July 30. Both 

 of these pigs contracted the disease and died. Experiments conducted 

 by the station with powdered virus indicated that this method is very 

 efficacious if carried out under the best conditions. Such conditions, 

 however, can not be found in old pens in which diseased hogs have 

 been confined. The best conditions for conducting such experiments 

 are to be found on the farm, in new pens, or on uninfected ground. 



A note on serum diagnosis of glanders, Bourges and Mery 

 {Arch. Med. Exper. et Anat. Path., Paris, 1. ser., 12 {1900), JVo. 2, 

 pp. 182-188). — The experiments of the authors on this subject included 

 a studj^ of the reactions of glanderous serum in horses which were not 

 affected with glanders, in glanderous horses which exiiibited clinical 

 symptoms of the disease, and in horses which reacted to the mallein 

 test but showed no clinical symptoms. 



The general conclusions of these experiments may be stated as fol- 

 lows: If the blood of a horse agglutinates the glanders bacillus when 

 diluted to the extent of 1 to 300 parts or more, the presumption is that 

 the horse is glanderous. Agglutination in cases of less dilution does 

 not necessarily imply the presence of glanders in the horse. 



Some examples of the development of knowledge concerning animal 

 diseases, D. E. Salmon ( JJ. S. Dept. Agr. Yearbook 1899, pp. 93-134) ■ — The author 

 presents a brief historical account of the study of glanders, cowpox, horse pox, 

 contagious pleuro-pneumonia of cattle, anthrax, blackleg, and Texas fever. 



Administrative work of the Federal Government in relation to the animal 

 industry, (i. F. Thompson ( f/. S. Dept. Agr. yearbook 1899, pp. 441-464). — An his- 

 torical account is given of the quarantine and administrative work of this Depart- 

 ment in combating contagious pleuro-pneumonia, Texas fever, sheep scab, hog 

 cholera, blackleg, bovine tuberculosis, in the inspection of animals intended for 

 slaughter, and in thi; inspection of meat. 



Diseases of animals {Rpt. Provincial Bd. Health Ontario, 1899, ))p. 33,34). — 

 Brief reports are given on cases of canine rabies, anthrax, and blackleg. 



Report of the animal pathologist, A. T. Peters {Nebraska Sta. Rpt. 1899, pp. 25- 

 28). — Tlie division of animal pathology has devoted attention to hog cholera, black- 

 leg, calf cholera, ergotism, keratitis, cattle itch, foot disease, lumpy jaw, tuberculosis, 

 and glanders. 



