122 EXPERIMENT STATION RECORD. 



ri'Hulls :iri' siillicii'iit, it is lii<ilily iici'dfiil tliat tlic time of cvaitoration, suil'acc cx])!!?- 

 uiv, and othcrdctails affccfiiifr tlic rate of cNaiioratioii lie a?l)itrarily fixed and rijridly 

 adlu'red to." 



The methods of estimating- mustard oil and the effect of the formation of 

 mustard oil from Indian rape in the digestive tract of ruminants, ( ). ll.\<;i> 

 MANN and W. H<)i,TscnMii)T [Fi'ihUiKfn Laiidir. ZUj., 61 {1902), No.s. 2.), jtp. 8(19-871; 

 24, ]>]>■ 895-901). — The conditions of tcinix'rature, moisture, etc., under which inu.«- 

 tard oil is fornii'd were studied with esjx'cial reference to the conditions i)revailin<r in 

 the digestive tract of ruminants. 



The choice of an antiseptic for preserving- samples of milk for analysis, 

 M. LiNDET {Rev. (Ihi. Ldll, 2 {1903), No. 10, pp. S70-372).—\n tliis brief report, 

 which is based upon numerous communications received from analysts in different 

 countries, the author as referee recommends the use of iwtassium bicliromate (0.5 

 gm. jter.Hter) or formahn (<iO (b-ojjs per liter) for the preservation of samples of milk 

 for analytical ]inr])oses. 



Some unknown and some little kno^vn oils, J. J. A. Wi.is iZhclir. lJntrri<vr]i. 

 Nahr. ii. Genu^-'tniil., C> {1903), No. 11, pp. 492-4^0) .—Chen\\vi\\ studies are reported 

 of oil made from the seeds of Echhiop.t rilro, Prrilhi ori/moiilfK, watermelon, tea, 

 garden cress, radish, and nmstanl. 



A new mill for laboratories, T. Koumer ( ( 'hnn. Zl(j.,27 {1903), No. 42, jfp- ■'>^^i 

 503, fig. 1). — The mill is construct('<l on the ])rincipieof beating rather than grinding. 

 The material is kept thoroughly stirred by means of a current of air, the particles of 

 the desired degree of fineness jiassing out through a sieve at the Jxittom of the mill. 

 The interioi' of the mill is readily accessible and is easily cleaned. 



International Congress of Applied Chemistry at Berlin, June 2-8, 1903 — 

 Agricultural chemistry {Chi'm. Zlg., 27 {1903), No. 47, pp. 564, 5G5).~\ brief 

 account is here given of discussions of the following subjects: Analysis of Nitrates, 

 bj^ H. Fresenius; The Determination of Potash by Means of Perchlorate, by Precht; 

 The Direct Determination of Phosi^horic Acid as Molybdic Anhydrid, by R. Woy; 

 The lodometric Determination of Phosphoric Acid, by Klason; The Report of the 

 Committee on Analysis of Fertilizers and Feeding Stuffs, by von Grueber; The Con- 

 struction of Balances for Analytical Work, by Felgentriiger; A New (Travimetricand 

 Volumetric Method of Determining Ammonia, by V,. Riegler; and The Stiitement of 

 the Results of Analysis, by W. Fresenius and Christomanos. 



BOTANY. 



A monograph of the genus Sorbus, T. IlEnwxn (A'. Sirnshi Vcfrnsl-. Akad. 

 Handl., 35 {1901), No. 1, pp. 1-147, figi^. 37).— In addition to a l)otanical study of 

 the species of Sorbus, the author gives an account of their distribution, economic 

 value, varieties, hybrids, and other modified forms. Fifty-five species are recognized 

 and a numl)er of forms and hybrids are considered distinctive enough to receive 

 definite names. 



A text-book of plant physiology, G. J. Peirce {Nev York: JTenry Holt lO Co., 

 1903, p)i. VI \ 291, //r/.v. i?.)).— This text-book is the outgrowth of the author's lectures 

 at Leland Stanford Cniversity, and is designe<l as a treatise on plant physiology that 

 shall cover the field less exhaustively than is done by Pfeffer and others, but more 

 fully than in the so-called Bonn text-book. The author presents the main facts of 

 plant physiology, adopting a conservative attitude regarding the various hypotheses 

 of the phenomena of plant life and suggesting definite problems for further investi- 

 gation. No attempt is made to give lal)oratory directions, as the book is strictly a 

 text-book, which should be supplemented by laboratory work under the direction of 

 the teacher. The subjects of respiration, nutrition, absorption, and movement of 

 water; growth, irritability, and reproduction are treated in detail, and the copious 



