BOTANY. 21 



kaolin and anhydrous sodium sulphate, solution of the fat by ethyl ether, evapo- 

 rating an aliquot part of the solution and weighing the residue). — i . w. \v<>u . 



Hydrogen generator, C. Aschman ( Chem. Ztg., :l • / </ . Vo. 100, p. 1049, fig. 1).— 

 The essential parts are a filter Hash with an exit tuhe for the gas affixed, and a cylin- 

 der of zinc attached to a glass rod, which slides up or down at will through a per- 

 foration in the rubber stopper. By this means the zinc may be lowered into the arid 

 in the tlask or raised out of it at pleasure. — J. T. ANDERSON. 



A burette with a new glass cock ( Chem. Ztg., 21 (1S97), Xo. 00, p. 1041, figs. 2). — 

 This burette terminates below in a thickened, stopper-like arrangement, with a 

 lateral opening about half way down. Fitting over this is a ground glass, cone- 

 shaped hood, which is provided with an outlet tube. This hood is movable laterally, 

 aud thus its outlet tube may be brought into connection with the aperture of the 

 stopper when the liquid from the burette escapes. A slight turn either way closes 

 the burette. — J. t. anderson. 



A new extraction apparatus, H. Gockel (Ztschr. Angew. Chem., 1S07, Xo. 21, p. 

 683). — This apparatus is recommended for the extraction of both solids and Liquids 

 with extraction fluids either lighter or heavier than the material to be extracted. 

 It is made of sufficient size to accommodate 125 gm. of liquid or 150 gm. of solid 

 matter. — j. i?. i.ixdsey. 



A new measuring pipette, < >. Blkier ( Chem. Ztg , 21 ( 1807), Xo.OS, p. 102S, fig. 1).— 

 The instrument consists of a succession of four bulbs and terminates in a stem so 

 constructed that the bulbs and the stem are of exactly the same volume (say 10 cc.) 

 and have graduation marks accordingly. The stem is subdivided into tenths and 

 hundredths. The pipette is filled by a suction tube at the top. and this tube is pro- 

 vided with a piueh cock, by means of which the outflow of the liquid is regulated. 

 If 10 cc. or less is wanted, fill the stem only — that is, to the first 10 cc. division — and 

 allow the desired quantity to tiow out. If more than 10 cc. and not more than 20 cc. 

 is desired, fill the stem and the first bulb — that is, to the second 10 cc. mark — and 

 allow the desired volume to fiow out. This form may be used for burettes as well 

 as for pipettes. — j. r. ANDERSON. 



Regulations for the construction and calibration of measuring apparatus pro- 

 posed by the Association of German Chemists (2. Congres Internal. Chim. Appl., 

 1896, II, pp. S75-378). 



On normal saccharimeter weights, H. Courtonne (2. Congres Iiiternat. Chim. 

 Appl., 1806, II, pp. 307-400). 



Graduation of saccharimeters, A. Jobin (2. Congres Internat. Chim. Appl., 1S0G, 

 II, pp. 370-300). 



Unification of saccharimetric scales, D. Sidersky (2. Congres Internat. Chim. 

 Appl., 1896, II, pp. 301-396). 



Report on agricultural-chemical work, V. Stein (Tidxxlcr. Landokon., 16(1897), 

 Xo. 5-6, pp. 649-674). — The main results are given of the analyses of 7,111 samples 

 of agricultural products made during 1897, with general discussions. The uuniber 

 of samples of various products analyzed was as follows: Feeding & tun's, 496; artifi- 

 cial fertilizers, 1,265; dairy products, 5,312 (viz, milk, 2,581; butter, 2,695; and cheese, 

 36); manures, 37; soils and marls, 10; root crox>s, 16; and sundry products, 8. — 



F. W. WOLL. 



BOTANY. 



Notes upon bean and pea tubercles, B. D. IIalsted (Proc. Soc. 

 Prom. Ayr. Sri., 1897, pp. 77-81). — The author calls attention to some 

 observations made upon the prevalence of root tubercles under varying 

 conditions of growth of the host plants. In his experimental work at 

 the Is'ew Jersey Station he found that in every ease there was a decided 



