AGRICULTURAL ENGINEERING. 105 



cal peculiarities of Bertia delafondias found in tin- small intestines of the common 

 pigeon. The literature of the subject is briefly reviewed. 



A bacillus found in eggs, L. Palmans (Bui. Agr. [Brussels], 20(1904), No. S, 

 pp. 447-452). — A bacillus was isolated from hens' eggs and was found to he patho- 

 genic for guinea pigs l>ut not for pigeons, rabbits, or chickens when inoculated in 

 small doses. Morphologically the organism could hardly he distinguished from the 

 anthrax bacillus, which it also closely resembled in its behavior on various culture 

 media. The author suggests that this organism may he a parent form of Bacillus 

 anthracis and B. subtilis. 



The formation of toxins by rabies virus, < >. 1 1 eller and E. Bertarelli ( ( 'entbl. 

 Ball. a. P,,,\, 1. Alt., On,,., ,36 (1904), No. .', pp. 216-222).— The literature of this 

 subject is critically discussed in connection with a short bibliography. The purpose 

 of the authors' experiments was to determine whether rabies toxins are combined 

 with certain bodies or are free in the fluids of the tissues. The brain and spinal 

 cord of rabid rabbits were tested with this object in view . 



It was found that the brain substance of rabid animals is toxic, while that of 

 normal animals is toxic to a smaller extent. The symptoms produced by rabies 

 toxin are not uniform or constant. Experimental animals gradually acquired a cer- 

 tain resisting power toward repeated injections of brain substance. Xo immunity is 

 produced, however, by inoculation of noninfectious material. 



Chorea in dogs, E. Joest (Ztschr. Thiermed., 8 (1904), A'-/. 3-4, pp. 179-201). — 

 The literature of this subject is critically reviewed, together with detailed notes on a 

 case observed by the author. The symptoms in all cases appear to be quite similar, 

 the most characteristic symptom being irregular muscle contractions. The disease 

 runs a slow course, with ultimate recovery in most cases. Chorea is almost without 

 exception a sequela of distemper. Human and canine chorea have much in common. 

 Both occur after infectious diseases and are accompanied by almost identical lesions 

 in the central nervous system. 



Salipyrin poisoning in dogs infested with Ascaridae, Haase i Berlin. Tierarztl. 

 Wchnschr., 1904, No. 5, p. 70). — The administration of salipyrin in small doses to 

 dogs was found to produce epileptiform spasms and acute gastritis, followed by 

 death. The dogs were infested with Ascaris mystax, which had already brought 

 about a serious intestinal catarrh. 



The extirpation of wild carnivora, J. M. Orpen (Agr. Jour. Cape Good Hope, 

 24 (1904), No. i':. pp. 689-694). — Attention is called to the danger from the spread of 

 rahies in southern Africa. In order to prevent this the author recommends the 

 destruction of all carnivorous animals which may carry the disease. Various meth- 

 ods of trapping, poisoning, or otherwise killing carnivora, including rats, are 

 described. 



AGRICULTURAL ENGINEERING. 



Irrigation in humid climates f Wisconsin. Sta. lij>t. 1903, j>/>. 318-332). — A sum- 

 mary of investigations during the Id years ending with 19011 The following articles 

 are included: 



Amount nf watt r n- cessary for the production <>/ a pound of dry matter, by E. H. King 

 (pp. 318-322). — The Amount of Water Required to Produce a Pound of Dry Matter 

 in Barley, Oats, Corn, Clover, and Peas in Wisconsin (E. S. R., 5, p. 484); The 

 Amount of Water Required to Produce a Pound of Dry Matter in Wisconsin (E. S. R., 

 7, p. 567); The Number of Inches of Water Required for a Ton of Dry Matter in 

 Wisconsin ( E. S. R., 8, p. 293); The Importance of Right Amount and the Right 

 Distribution of Water on Crop Production ( E. S. R., 10, p. 74(3). 



Amount of water needed for maximum crops under field conditions (pp. 323-332). — 

 The Influence of the "Water Pumped on the Yield of Crops Grown on tin' Area, by 

 F. H. King (E. S. R., 8, p. 295); Experiments in Irrigation, by F. H. King (E. S. R., 



