26 EXPERIMENT STATION RECORD. 



On the determination of oxygen in the air and in water, D. A. Kreider (Ztschr. 

 anorgan. ('hem., 13 (1897), No. 6, p. 418; ahs. in Chem. Ztg., 21 {1897), No. 17, Bepert., 

 p. 44). 



The determination of alkaline hydroxids and carbonates, G. LUNGE (Ztschr. 

 angeiv. Chem., 1897, No. 2, pp. 41, 42). — The article is similar to that by Kiister l and cor- 

 roborates his results. 



Determination of potash and phosphoric acid in fodders, II. W. Wiley ( Tour. 

 Amer. Chem. Soc, 19 (1897), No. 4, pp. 320-322). — A much more rapid method than 

 the official method for analysis of ash. The article is concise and can not well be 

 abstracted.— f. w. morse. 



A method for the separation of aluminum from iron, F. A. Gooeii and F. S. 

 Havens (Ztschr. anorgan. Chem., 13 (1S97), No. 6, pp. 435-440). — The separation is 

 effected by the insolubility of aluminum chlorid in a mixture of ether and concen- 

 trated hydrochloric acid saturated with hydrochloric-acid gas, while ferrous chlorid 

 is readily soluble in such a solution. The details of the method are easily executed 

 and the results satisfactory. — v. w. morse. 



On the determination of citrate-soluble phosphoric acid in Thomas slag by 

 means of free citric acid, M. Passon (Ztschr. angew. Chem., 1896,No.22,pp. 077. 678). — 

 The author substitutes free citric acid for Wagner's solution. The most practicable 

 strength of acid was found to be 2.8 per cent, used at the rate of 7 parts by weight 

 of citric acid to 5 parts of slag, i. e., 500 cc. solution to 10 gin. slag.— i . w. mouse. 



Automatic gas shut off upon breaking water connection, II. Michaelis [Chem. 

 Ztg., 21 (1897), No. 21, 7*. 194, fig. 1 ). — The gas cock is operated by a lever which car- 

 ries a funnel on one end and a counterpoise on the other of such weight as to balance 

 the funnel when it is full of water. There is a constant flow of water from the water 

 pipe through the funnel, when desired, the inflow and outflow being so adjusted as 

 to keep the funuel full, and consequently the lever in a horizontal position, which 

 leaves the gas connections open. When the water connections are broken, for any 

 reason, the funnel empties itself and the counterpoise moves the lever, thus shutting 

 oil' the gas.— .1. T. ANDERSON. 



Some apparatus for the technical analytical laboratory, E. S. Johnson (Jour. 

 Amer. Chem. Soc, 19 | 1891 I, Ye. /, pp. 281-290, figs. M.— Although devised for an iron 

 and steel laboratory, pari of the apparatus, especially those forms for the rapid 

 measurement of reagents and for continuous filtration of Large volumes of solution, 

 would be equally advantageous in an experiment station laboratory. — r. w. morse. 



Anew extraction apparatus, T. GONTHER 1 ('hem. Zt;/.. .7 1 1897), No. 19, pp. 169, 

 170, figs. 2). — This is more properly a new stand or support for an extraction set or 

 battery. The extraction flasks, arranged in a rowover gas burners, rest on asbestos 

 plates or pieces of wire gauze, which are independently adjustable in the frame. 

 Tho woodeu supports for the condensers are divided longitudinally into halves 

 (damped together Cor convenience <>i' adjustment to the condensers. These supports 

 may be clamped to the uprights at an\ desired height, and hence, may be used with 

 extraction llasks of any Bize. — J. T. A.NDERSON. 



Rules and tariff for agricultural chemical examinations at the chemical con- 

 trol station in Christiania, Norway ( Tidsslr. norske Landbr., 4 (1897), pp. 182-134). 



BOTANY. 



The evolution of heat by wounded plants, H. M. IvICHARds 

 (Ann. Bot.f 11 (1897), If 0. il. pp. 29-63). — Tho author conducted an 

 extended series of experiments with potatoes, kohlrabi, carrots, onions, 

 cucumbers, radishes, and the leaves of Diervilla and Liriodendron, the 



» Ztschr. anorgan, Chem., 13 (1897), No. 1, p, 1_'7, 



