482 EXPERIMENT STATION RECORD. 



dauKei' of transniitting the discaso in iiiilkiii^r shwp whore these auinials are 

 kept for milk. The disease can not l>e cnred by external treatment, as it is 

 necessary to remove the affected part of the udder. 



Certain eye diseases among' horses, V. Okholm {Maanedskr. Drylwger, 19 

 {1908), A'o. 12, pp. .)'/.9-,)66). — Notes are given on the i)athology, distribution, 

 occurrence, and treatment of periodic ophthalmia, siin])le iritis, and FUaria pap- 

 UJo.hu in the eye. 



Immunization against glanders, A. Makxkr (Berlin. Tierarztl. Wclnisclir., 

 1!>0S, Xo. I J, pp. 229-231). — Exi>eriments were made in attenuating cultures of 

 glanders bacilli in solutions of glycerin and urea. It was found that tlie at- 

 teiuiation was directly proportional to the temperature and inversely i»roix)r- 

 tional to the density of the emulsion. No satisfactory results were obtained from 

 the use of attenuated bacilli. Hy killing the glanders bacilli in a 10 per cent 

 solution of urea a more satisfactory jn-eparation was obtained. For this pur- 

 liose 0.1 gni. of the bacilli was placed in 4 cc. of the urea solution for IT hours. 

 A dry extract was obtained from this material and used for immunizing pur- 

 poses. Similar results were obtained with the use of glycerin in the place of 

 urea. 



Experiments were tirst carried on with laboratory animals and later with 

 horses. It was found possible to produce an immunity in horses for a period 

 of at least 1 year by a single injection with a preparation of dead glanders 

 bacilli. 



Loco weed poisoning in horses, A. T. Peters and L. P>. Sturdevant (Nc- 

 bra.ska /S7«. Rpt. 1907, pp. 7.'f-107, ftffx. //). — As a result of experiments con- 

 ducted, the authors conclnde that " hnnger will lead many horses to eat loco 

 weed when the grass is short, especially in the early spring or in the late fall, 

 or even in wet seasons when the grass is not short, probably because the weed 

 is then more succulent. A small grain ration when the grass is short will 

 usually be sufficient to keep the animals from forming the loco-eating habit. 

 After a horse has eaten loco for a time, this habit becomes permanent in most 

 cases." 



The loco-eating habit was iiermanently formed in 1 horse after 118 lbs. of 

 picked Antrd gains moUissimus had been eaten and probably long before this. 

 " This animal lived G2 days after the picked loco was first fed and consumed a 

 total of 322 lbs. of this besides that eaten in pasture and on the prairie. Six 

 lbs. of picked AragaUus Jamhcrti fed in 1 day to a second horse was not suffi- 

 cient to induce the loco habit, but after 2\l lbs. of picked .1. lamhcrti and lOi lbs. 

 of .1. DifiUi.Hsinuis had lieen eaten the habit was permanently induced. This 

 animal died 25 days after the first of this weed had been fed. The loco-lating 

 habit was permanently Induced in another horse by ."> lbs of .1. inollissimus fed 

 on each of 2 successive days. The total amount of picked loco eaten by this 

 animal was 2214 lbs., and death occurred 50 days after the first of this was fed. 

 Post-mortem examinations indicated that the greatest change was induced in 

 the nervous system, which showed much congestion throughout. 



A protozoan observed in cases of epizootic lymphangitis in mules, E. 

 DrcLorx (Compt. Rend. Soe. Biol. \ Paris]. (!>, (/.'W,S), Xo. IS. pp. 593-r)95).^ 

 The author had opportunity to examine the ])athological lesions in mules 

 affected with epizootic lymi)hangitis, particularly in the fore legs. The puru- 

 lent material obtained from swellings contained leucocytes which were infected 

 with a protozoan parasite. In some cases a single polyuuclear leucocyte 

 contained as many as 32 of the parasitic protozoa. These parasites were 

 observed in various stages of development undergoing division and changes of 

 form. The author proposes the name Leiiroeiftoroon piroplasrnoides for the 

 parasite. 



