12 EXPERIMENT STATION RECORD. 



for the detection of foreign fats in l^utter when the other constants deviate 

 eqnaliy from the normal fignres. With butters which have a medium or a high 

 saponification value and Reichert-Meissl figure, and also a high difference num- 

 ber, it only lias a limited '.alue. The method is deemed valuable for the de- 

 tection of bovine fat in lard, but it must be carried out in accordance with the 

 author's directions. 



About melting point determinations, PI. Gt;TH (I'hann. Zcntralhalle, //.9 

 (J'JOS), No. 37, pp. 139-lJil; ahs. in Ztschr. Untersuch. Nahr. u. GcnuNsmtL, 18 

 iUWO), No. J, p. 32()). — Comparative tests with the melting-point method as 

 described in the German pharmacopoeia and that described by Polenske showed 

 that the two methods give different values. 



The value of the oil of sesame reaction, L. Hoton (Ann. Falsif., I {IH08), 

 No. 2, pp. l)-'J-<)7). — A discussion of the furfurol reaction with sesame and olive 

 oils from various sources. 



The comparative examination of the halogen absorption of oils by the 

 methods of Hubl, Wijs, Hanus, and Mcllheney, J. S. Kemington and X. Lan- 

 caster (Pharm. Jour. [London], J/, ser., 29 (1909), No. 2389, pp. IJ/G, IJfl ; ahs. 

 in Jour. 8oc. Chem. Indus., 28 (1909), No. 16, p. 8.92).— The Mcllheney bromin 

 method is deemed much better than any of the other 3 methods, as the absorp- 

 tion is almost instantaneous and the solutions can be easily prepared. The 

 Wijs method gave better results than the Ilubl and Hanus methods, and was 

 most accurate and rapid when there was an excess of 70 to SO per cent of 

 halogen. The maxinnmi absorption was obtained in 2 hours with linseed oil 

 and in l hour with nondrying oils. Seniidrying oils required 1 hour. 



A short handbook of oil analysis, A. H. Gill (Philadelphia and London, 

 1909, 5. ed., rev. and enl., pp. 179, figs. 6). — In this revised and enlarged edition 

 those portions dealing with the detection of animal and vegetable oils, the 

 treatment of nnsaponiIial)le matter, and the turi)entines have been entirely re- 

 written. A new chapter upon waste fats and oils has I)een added. 



Report on the work of the agricultural experiment station at the Uni- 

 versity of Jena. I, Agricultural-chemical division (Bar. Landtc. Vers. Stat. 

 Univ. Jena, 1908, pp. /-/'/). — A report as to analyses made of fertilizers, feed- 

 ing stuffs, milk and dairy products, the maximum, minimum, and average con- 

 tent of the various constituents being reported in some instances, with brief 

 notes. 



Report of Orebro Chemical Station and Seed Control Station, 1908, 

 .7. AViDEN (Orebro Kern. Stnt. och Frokontrollatist. Arsher. 1908, pp. 32). — This 

 is a suniiiiai'v of the results of work during the year. 



[Analyses of koa and ohia bark and slum gum], Alice R. Thompson 

 (Hairaii Sta. Rpt. 1908, p. 62). — Analyses of koa and ohia bark showed a 

 tannin content of 19.91 and 5.73 per cent, respecti\ely, calculated to dry sub- 

 stance. A sample of extracted slum gum was found to contain only 25.27 per 

 cent of wax. 



Italian lemons and their by-products. II. — The by-products of the lemon 

 in Italy, E. M. Ciiace (U. 8. Dept. Agr., Bur. Plant Indus. Bui. 160, pp. 35-50, 

 plx. 3, figs. 2). — This is a description of the various lemon-producing districts 

 of Italy and of the methods of producing lemon b.v-products. 



The methods of i)ruducing tlu- essential oil of lemon by the two and three 

 piece sponge methods and the machine method are described in detail. The 

 machine method yields the best grade of oil. There are also descriptions of 

 the treatment of the peel residue, which in most instances yields an inferior 

 grade of oil, and of the manufacture of calcium citrate from the pulp .juice. 

 Data are given as to the cost of production of these by-products in comparison 



