1136 EXPERIMENT STATION RECORD. 



endothelial origin. In advanced cases of the disease nearly all of the nerve cells are 

 destroyed. 



Experimental diagnosis of rabies, C. Livon (Compt.' Rend. Soc. Biol. [Paris], 



57 (1904), No. 33, pp. 479, 480).— The results obtained during the author's investi- 

 gation of this problem indicate that it is always wise to make control inoculations 

 with an emulsion of portions of the central nervous system in sterilized glycerin 

 sometime after the beginning of putrefaction of the nervous tissue. This method, 

 however, may lead to the development of septicemia and on account of the great 

 susceptibility of rabbits to septicemia it is advisable to inoculate a few guinea pigs 

 for purposes of comparison. 



Experimental diagnosis of rabies in decomposing 1 nerve centers, C. Xicolle 

 [Compt. Rend. Soc. Biol [Paris], 57 {1904), No. 30, ipp. 349-451).— -While the 

 experimental diagnosis of rabies in living animals is a comparatively simple matter, 

 it is very difficult to diagnose the disease by inoculation with brain matter taken 

 from dead animals in the process of decomposition. In such cases infected animals 

 are likely to die of septicemia, and therefore no diagnosis can be reached. 



During the author's experiments it was found that nerve substance in a state of 

 decomposition could be satisfactorily used in making test inoculations provided it 

 was previously treated with glycerin. It appears from these experiments that 

 glycerin has the power of destroying other organisms which may be present in the 

 virus, while it does not affect the rabies organism. 



The dog: Hygiene, diseases, J. Pertus (Le cJiien: Hygiene, maladies. Paris: 

 J. B. Bailliere & Sons, 1905, pp. YIII+388, figs. 80).— This is a revised edition of the 

 author's treatise on the dog in which particular attention has been given to the 

 pathology of all diseases which affect this animal. The volume contains an account 

 of the external and internal anatomy of dogs, their hygiene, the use of dog meat as 

 human food, reproduction, and all diseases classified according to the organs affected. 



AGRICULTURAL ENGINEERING. 



Pumping for irrigation, J. J. Vernon, F. E. Lester, and II. ('. McLallen 

 (New Mexico Sta. Bui. 53, pp. 16, figs. 2). — This bulletin reports tests of the fuel cost 

 of pumping water with a 6 in. centrifugal pump driven by a 22 horsepower gasoline 

 engine with crude oil'attachment, the pump being placed in the 6 in. well described 

 in a previous bulletin of the station (E. S. R., 15, p. 195) and the fuels used being 

 crude oil from Beaumont, Texas, kerosene, and gasoline. The results obtained are 

 briefly summarized as follows: 



"Crude oil was proven to be the cheapest fuel yet tested at this station, that is, 

 cheaper than wood, coal, kerosene, or gasoline. The cost of a 10 hour run with the 

 above named engine on each kind of oil was as follows: Crude oil $3.05, kerosene 

 $6.57, and gasoline $6.65. Therefore, for a 10 hour run, crude oil cost 535 per cent 

 less thai; kerosene and 54 per cent less than gasoline, all being used in the same 

 engine under practically identical conditions. 



"The residue from the crude oil was used as a lubricant on ordinary bearings with 

 good effect. The residue also gave good results when used on the streets for laying 

 the dust. 



"Rope belting was not satisfactory in these tests. 



"Large engines when used for pumping purposes should always be provided with 

 friction-clutch pulleys so that they may be started without load." 



The tests are to be continued in order to determine whether difficulties will develop 

 with extended use. 



Water and irrigation in the Province of San Luis, Argentine Republic, 

 A. L. Ceavetti (An. Mm. Agr. Argentina, Sec. Agr. (Agron.), 1 (1904), No. 5, pp. 85- 

 119, figs. 6). — This is one chapter of a detailed report on the agricultural conditions 

 of this province summarizing information regarding surface and subterranean waters 



