ZOOLOGY. 473 



Do Rontgen rays exert an influence upon bacteria? J. Wittlin {Centbl. Jiakt. 

 und Far. AlUj., 3 (1S96), No. 21, 2>P- 676, 677). — From the author's experiments he 

 thinks Routgen rays exert uoinlluence whatever upon bacteria. 



A contribution on the gases produced by certain bacteria, L. H. Pammei, and 

 E. Tammkl {('eiithl. Jiukt. und Par. AlUj., 2 {/S96), Xo. 20, pp. 633-6o0, pi. 1). 



Concerning crystal formation in nutrient media, J. Nowak and S. Ciechanow- 

 SKI {Cenihl. Jkikt. loid Par. Med., 20 {1S96). Xo. 1S~19, pp. 679, 680). 



Disinfection by vapors of formic aldehyde, L. Vaillard and G. H. Lemoine 

 {Anu. Inst. Pasteur, 10 {1SD6), Xo. 9, pp. 481-4S7). 



A self- regulating pasteurizing apparatus, V. Henriques and V. Stribolt {So. 

 Beretniug fra den Kgl. J'eterin. og Landhohojukoles Lahorat. for landolconom. Forsiig.; 

 abs. in Chem. Zfg., 20 {1S96), No. 8S, Bepert.,p. 260). 



A practical method for preparing agar for cultures (Ztschr. angeiv. Mikroa., 

 2{1S9G), No. 8, p. 237). 



Egg yolk as a nutrient medium for bacterial cultures, A. Capaldi (Centbl. liakt. 

 und Far. Med., 20 (1896), No. 22-23, pp. 800-803). 



A new method of making pure cultures of yeasts and similar organisms, 

 H. Will (CenthJ. liakt. und Far. Allg., 2 (1896), No. 15, pp. 483-497). 



Concerning bacterial plate cultures, M. Jegunow (Centhl. Bakt. und Far. Allg., 

 2 (1896), No8. 14, pp. 445-449; 15, pp. 478-482, i)ls. 2). 



A new culture oven for bacteria, etc., F. Sartorius (Ztschr. angeiv. Mikros., 

 2 (1896), No. 5, PI). 129-133, figs. 2). 



Modern theories of fermentation, with notes on the morphology and culture 

 of yeasts, F. Wyatt (.Jour. Franklin Inst., 142 (1896), Nos. 4, p. 286; 5, p. 336). 



Concerning the nomenclature of the so-called tubercle bacillus, A. Coppex- 

 JONES (Centhl. Bakt. und Far. Med., 20 (1896), No. 10-11, pp. 393-395). 



The present position of systematic bacteriology, C. Mez (Bot. Centhl., 68 (1896), 

 No. 7, pp. 203-211). 



The bacteriological examination of water for typhoid bacillus, T. H. Peaemain 

 and C. G. MooK (Analyst, 21 (1896), p. 117). 



ZOOLOGY. 



Field experiments devised for the destruction of mice by means of the bacil- 

 lus isolated from the Casan marmot [Spermophilus citillus], S. S, Meresh- 



KOWSKY (Centhl. Bakt. nnd I'ar. Med., 20 (1896), Nos. 2-3, pp. 85-94; 4-5, pp. 

 176-187). — The author describes experiments in -which the organism was fed to mice 

 by mixing bouillon containing it with rye flour and distributing this dough cut into 

 small jiieces over tlie area to be infected. 



On the acclimatization of organisms to high temperatures, C. B. Davenport 

 and W. E. Castle (Arch. Enttvickl. Organismen, vol. 2, No. 2; ahs. in Bot. Centhl., 68 

 (1896), No. 9, pp. 292, 293). 



The differentiation of organisms, A. L. Abbe (Rev. Sci., ser. 4,6 (1896), No. 25, pp. 

 774-779). 



List of mammals of the District of Columbia, V. Bailey (Proc. Biol. Soc, Wash- 

 ington, 10 (1896), pp. 93-101). — Tiiis is an annotated catalogue of 38 species known to 

 occur within a radius of 20 miles from the Capitol, and most of them witliin the 

 District linjits. Brief observations on the liabits and on some individual specimens 

 collected are included. 



Taxidermy : How to collect, skin, preserve, and mount birds, B. H. Waruex 

 (Pennsi/lrania Dept. Agr., Dirision Economic Zoiilogg Ilul. 6, pp. 128, figs. 11). — A con- 

 densed account is given of methods for collecting, skinning, i)rcserving, and 

 mounting birds, together with the game and lish laws of the State. 



The preservation of museum specimens w^ith retention of their natural 

 colors, C. IvAisEiiLiNG (Wiener klin. Wochenschr., 33 (1896), p. 35 ; ahs. in Chem. Ztg., 



