890 EXPERIMENT STATION RECORD. 



studying parasitic insects, mites, and worms^, and a general account of the ])acteria 

 which cause the common infectious di^ea-es. 



The histology of the spleen during the course of infectious diseases, 

 DoMixici {Arch. Med. E.rper. et Anat. Path., J'ari.y, 1. .^cr., 12 {1900), No. 6, pp. 733- 

 768, X)ls. 3). — The author conducted experiments for the purpose of determining the 

 role of and anatomical changes in the spleen during an infection of septica?mia 

 caused by the bacillus of Eberth. It was found that the spleen under such condi- 

 tions fulfills the function of producing leucocytes and giant phagocytes. During the 

 process of the disease the spleen underwent a myeloid transformation. 



The germicide and agglutinating properties of serums immunized against 

 Bacillus pyocyaneus, P. Muller {Crnthl. Bukt. v. Par., 1. Aht., :.'S {1900), No. IS, 

 pp. 517-587). — From experiments made outside of the animal organism, the author 

 concludes that in the absence of oxygen the germicide power of the normal serum of 

 guinea pigs toward B. pyocyaneus is greater than in the presence of oxygen. Non- 

 virulent bacteria were much checked in their growth by a normal serum, while 

 virulent forms were not especially affected. Serums which were immune to B. pyo- 

 cyaneus exhibited a stronger germicide power under aerobic conditions than normal 

 serum. 



Agglutination of the Trypanosoma of the rat upon different kinds of 

 serum, Lavekax and Nesnil (Compt. Rind. Sac. Biol. Paris, 52 {1900), No. 34, j)p- 

 939-942). — The author tested the action of the serum of different animals in aggluti- 

 nating Trypanosoma. Rabbits, dogs, sheep, horses, chickens, pigeons, and rats were 

 used for this purpose. The sera of all these animals, except that of the rat, aggluti- 

 nated the Trypanosoma within a period of an hour, when mixed with an ecpial 

 volume of defibrinated blood containing these parasites. The Trypanosoma was not 

 immobilized before it Ijecame agglutinated. 



Intravenous injection of potassium iodid and protargol, Peter {Berlin. 

 Tierarztl. Wchnschr., 1900, No. 33, pp. 385-387).— The author experimented with 

 intravenous injections of protargol in the treatment of a number of cases of morbus 

 maculosus. It was found that a single dose of 100 gm. of a 75 per cent aqueous 

 solution of protargol could be injected into the blood of cattle and horses without 

 injurious effects, and that a noticealjle therapeutic effect was produced by this 

 substance in the treatment of malignant catarrh of cattle. Potassium iodid was used 

 in combination with proteids. The results of the author's experiments indicate that 

 this substance may be safely used in intravenous injections. An experiment with 

 sodium iodid combined with proteids on the other hand demonstrated that this 

 substance is not suitable for intravenous injections, since serious disturbances were 

 produced in the red blood corpuscles which resulted in a hsemoglobinuria. 



Treatment of tetanus by fright, Kissuth {Berlin. Tierclrztl. Wchnschr., 1900, No. 

 45, p. 532). — Two cases of undoulfted tetanus were treated by fright produced by 

 firing a gun in the stall in which the affected horses stood. The gun was fired at the 

 time when the muscular contraction was at its height, and had the effect of producing 

 a complete muscular relaxation, after which the animals were a])le to eat and drink 

 without much difficulty. One case recovered completely after a period of 14 days, 

 while recovery in the other case was slower. 



Report of veterinarian, J. C. Robert {Mississipj)i Sta. lipt. 1900, pp. 36-40). — The 

 work of the year on Texas fever consisted chiefly in an attempt to determine the 

 value of blood inoculation in preventing the appearance of disease in southern cat- 

 tle and the discovery of some efficient curative agent. Twenty-five young northern 

 cattle were inoculated with blood from tick-infested native cattle. The amount of 

 blood used varied from l^o 5 cc. and was used in some cases as drawn and in other 

 cases defibrinated. Symptoms of inoculation fever appeared within 10 days. None 

 of the animals died and they were turned out with native cattle about 5 weeks after 

 the second inoculation. Southern cattle fretiuently die of Texas fever. Some cattle 



