880 EXPERIMENT STATION RECORD. 



591-602) ; (2) Contribution to tlio Histogenesis and Ilistolofry of the Vesicles, 

 Particularly as Relates to the Question of the Occurrence of Inclusion Bodies 

 in the Affected Parts (pp. 603-613) ; and (3) The Morphologj' and Biology 

 of the Cytoryctes Cocci Reported by Siegel to be the Cause of Foot-and-Mouth 

 Disease (pp. 351-380). 



Concerning the filterability of tiTpanosomes, S. B. Wolbach, W. H. Chap- 

 ifAN, and II. W. Stkvk.ns {.four. Mv,l. h'cscarch, 33 (1915), No. 1, pp. 107-117).— 

 The authors concludt' that trypanosonies from cultures and from animal tissues 

 are not filterable through bacteria-proof filters. 



The effect of daylight and drying on the human and bovine types of 

 tubercle bacilli, L. Finulay and W. B. M. Mautin (Vet. lice, 2S (1915), No. 

 11,30, pp. 253, 25 Jf). — From experimental evidence the authors have demonstrated 

 that there is little appreciable loss of virulence of either type of the tubercle 

 bacillus after seven days desiccation. Diffusetl daylight causes a definite 

 lowering of the virulence in both types, the human type being avirulent within 

 seven days. Under the combined inlluence of desiccation antl dilTused day- 

 light there is a marked fall in virulence. This fall is more pronounced in the 

 bovine than in the human type. 



In general it is concludiMl that the bovine type is distinctly more susceptible 

 to the elTect of ordinary atmospheric influences than is the human type. Such 

 difference may explain in part why aerial infection with the bovine type is so 

 Infrequent in the human organism. 



The intracutaneous tuberculination of chickens, .T. F. II. li. Van Leeuwen 

 {Ccnthl. liakt. [cic.^, 1. Abt., On//., 76 {HU5), No. ^, pp. 27.5-^8^).— From the 

 investigation it Is concluded that the intracutaneims tuberculination yields 

 fairly reliable results in the diagnosis of tuberculosis in chicl<ens. The 

 turgescence which occurs aftiT the injection is of no significance in the diag- 

 nosis, but in ju<lging a reaction the general .state of nutrition of the animal 

 nmst be taken into consideration. If it is desirinl to reinject, the usual inter- 

 mission of several weeks is not necessary as the injections may be given during 

 or shortly after the reacthm. Local anaphylaxis following a previous injection 

 does not occur in healthy chickens. In making the test it is necessary to u.se 

 avian tubercidin. 



A bibliograi)hy of 121 references is appended. 



The success and failure of the tuberculin test in certified dairies, 0. li. 

 RoADiiorsE {Jour. Aiiicr. Vit. ^[((l. Assoc, J,S {IHIi;), No. .}. pp. .',.^0-429).— 

 Methods of scientific supervision in certified dairies wliich have given satis- 

 factory results are outlined, and experimental results obtained from the sub- 

 cutaneous and Intradermal tuberculin tests are submitted. It Is indicated that 

 " the Intradernuil test Is somewhat more searching in Its diagnosis of incipient 

 cases of tuberculosis In animals than the subcutaneous." 



The diagnosis of infectious abortion in cattle by means of the Abderhalden 

 dialysis procedure, K. Katz ( llif»rr licniiztl. Motialsschr., 2 (1915), No. ^, 

 pp. 161-112). — The results ctf llie autlior's invt'stigation have tlemonstrated that 

 the serum of aninuils naturally or artificially infected with BaciUu.'i abortus Is 

 capable of cleaving the protein of abortion bacilli. Normal serum does not 

 possess this property. The dialysis proce<lure is, therefore, .specific in Infectious 

 abortion in cattle and Is valuable as a diagnostic method, the results being in 

 almost perfect accord with those obtained by the agglutination reaction. The 

 number of failures Is no greater than the usual experimental error due to faulty 

 technique. 



The special pn'iiaration of the antigen, or sul>strate. Is described in detail. 

 and the experimental data are presented in tabular form. A bibliography of 

 34 references Is appended. 



