BOTANY. Ill 



device for stirring the contents of several beakers at once, devisfd in tlie laboratory 

 of the agricultural ex])erim('nt station of I'Kst, is illustrateil and described. 



A new method for quantitative determination of furfurol and of the pento- 

 sans in vegetable materials, C. Couxclkh { ('him. Ztf/.. is (1804), Xo. ■'>1, pp. 9G0-90S'). 



On the pentoses and pentosans and their estimation by furfurol distillation, 

 B. ToLLENS (Ztschr. Ver. Bithem. Ind., 1894, May, pp. 420-437). — Urges the impor- 

 tance of always determining these in feeding stuffs and recommends the furfurol 

 distillation method for this purpose. 



On a method for the fractional precipitation of the albuminoids of blood 

 serum, W. Exgel {Arch. Hyg., 20, No. 3, pp. 214-218). 



Notes on the estimation of crude fiber in sugar cane, J. L. Bekson {.Jour. Amer. 

 Chem. Soc, 10 (1894), So. .;, pp. 308-313). 



Apparatus for determining the fat content of liquids, especially the cream 

 content of milk (Clum. Ztf/., 18 (1894), Xo. 51, p. 973, Jif/. I). 



The albuminoids of milk, M. Arthus (Arch, physiol., 4, ser. 5, p. 673; ahs. in 

 Ceiiibl. Fhii.sioL, 8, pp. 47, 48; and Chem. Centbl., 1894, I, No. 26, p. 1161). 



Behavior of milk toward rennet, R. Leze and E. Hilsont (Compt. liend., US 

 {1894), p. 1009; abs. in Chem. ZUj., 18 {1894), No. .50, Eejiert., p. 157). 



Convention of sugar chemists of Austria-Hungary at Graz, June 11, 1894 

 {Chem. Zti/., 18(1894), No. 49, pjp. 925, .9J6').— The limit of error allowable in the 

 determination of nitrogen in nitrate of soda, and experience with the methods of 

 N. von Lorenz and A. Jolles for the determination of phosphoric acid, were discussed 



On the gravimetric determination of reducing sugars w^ith alkaline copper 

 solution, E. NiHOLL (Chem. Zt<j., 18 (1894), No. 47, pp. 881, 882). 



Control of Fehling's solutions, A. Bokntrager (Zischr. angew. Chem., 1894, No. 

 12, p. 351). 



On the qualitative determination of tanning materials, H. R. Proctor 

 (Jour. Soc. ('hem. Ind., 13 (1894), No. 5, pp. 487-493). — Ten ([ualitative tests are 

 described and results of these trials on various extracts containing tannin are 

 recorded. 



Note on the estimation of tanning matter, H. R. Proctor (Jour. Soc. Chem. 

 Ind., 13 (1894), No. 5, pp. 494-496, Jig. 1). — Recent methods are briefly discussed and 

 attention is especially called to the determination of tannin by shaking the extracts 

 with powdered hide in a " milk-shake" apparatus. 



Contributions on the chemistry of tobacco smoke, R. Kisslixg (Arch. Hyg., 20, 

 No. 3, pp. 211-213). 



Progress in the chemistry of tobacco, R. Kisslixg (Chem. Ztg., IS (1894), No. 51, 

 pp. 90S, 909). — A revicAV. 



BOTANY. 



Active albumen as reserve material in plants, O. LoEW {Col- 

 lege of Ayr.., Tokyo, Japan., BuL, rol. 2, No. 1, pp. :28-33). — The author, 

 associated with T. Bokorny, has already shown' (1) that there exists in 

 many plants, apparently in a state of solution, a certain proteid sub- 

 stance quite <litferent from, ordinary proteids; (2) that this substance* 

 is capable of certain reactions, of which the living protoplasm, on 

 account of its great instability, is incapable, and which neither dead 

 protoplasm nor the known soluble proteids show; (3) that this sul)- 

 stance is used up during the growth and multiplication of cells, and 

 that it therefore plays the role of a reserve material. 



Bot. Centbl., 1889 and 1893; Biol. Centbl., vol. 2; Flora, 1892, p. 117, etc. 



