314 EXPEBIMENT STATION RECORD. 



methyl ester of linoleic tetrabroiuid to crystallize from alcohol iu white glisten- 

 ing plates resembling the ethyl ester. The slightly impure crystals melted 

 between 50 and 56°. The two esters of oleic dibromid were found to be yellow 

 oils, very soluble in most solvents, but very little soluble in their corresponding 

 alcohols saturated with HCl gas. 



"At present actual analysis of cotton-seed oil for linoleic acid falls far short 

 of the theoretical value indicated by the iodin value of the oil or the mixe<l un- 

 saturated acids. It is hoped tliat the case with which esters of the bromids of 

 the unsaturated acids are formed, especially linoleic acid, may eventually be of 

 value in clearing up the composition of cotton-seed oil." 



A new method for determining crude fiber, II. Stieoler (Jour. Landw., 

 61 {1913), No. 4, pp. 399-426, figs. 6).— The studies were made with barley and 

 its dregs for the purpose of obtaining a method of determining crude fiber 

 which is more exact and free from the objections raised to previously described 

 methods. 



In the method the material is treated with concentrated hydrochloric acid 

 in the cold for ridding the substances of complicated colloids, and is as follows : 

 From 1.5 to 3 gm. (according to the amount of crude fiber present in the ma- 

 terial) is ground to a flour-like consistency and placed in a 300 cc. Soxhlet 

 flask, such as is used for milk sterilization, and containing 20 cc. of distilled 

 water. After thorough distribution of the meal 60 cc. of concentrated hydro- 

 chloric acid (specific gravity 1.19) is added and the mixture allowed to stand 

 for 10 minutes. It is then made up to 200 cc. with boiling water, placed in the 

 boiling water bath of an inverting pot, and heat applied, at the same time a 

 current of air being passed slowly through the mixture. After heating for ex- 

 actly one hour the insoluble mass in the flask is allowed to settle and the super- 

 natant fluid is drawn off by a device which is illustrated. The residue in the 

 flask is neutralized with 50 cc. of a 5 per cent potassium hydroxid solution, 

 made up to 200 cc. with boiling water, and placed in the boiling water bath for 

 one-half hour, circulating air through it as before. The hot alkaline solution is 

 then brought on a Gooch crucible (4.5 cm. high and with an upper diameter of 

 4 cm.), and filtered through a disk of heated asbestos paper which is covered 

 with a layer of washed asbestos fiber. The residue on the filter is washed with 

 5(X) cc. of hot water, then with alcohol, and finally with ether, and allowed to 

 stand for one-half hour; the ether removed with the suction pump, dried for 

 two hours at from 100 to 105° C, and weighed. The fiber is ashed in a special 

 device which is illustrated. 



New agreement about malt analysis, G. Bode and A. Wlokka {Ztschr. 

 Gesam. Bratiiv., 37 (1914), Nos. 29, pp. 372-374; 30, pp. 384-386; flfts. in A)7ier. 

 Brewers' Rev., 28 (1914), No. 9, pp. 430-432).— A. plan for the unification of 

 methods for malt analysis, as submitted to the German Chemical Society by the 

 section on fermentation chemistry. 



The methods which are given in this report were tested out cooperatively 

 during the course of two years. They consist of those for sampling, crushing, 

 and determining the fineness of crushed malt, moisture, extract, saccharifica- 

 tion, and color of the wort. The physical examination is for the condition of 

 the meal body, 1,000 kernel (berry) weight, and hectoliter weight. The length 

 of the acrospire is not to be determined. A blank for reporting results is 

 shown. 



The American Leather Chemists Association. 1914 (Amer. Leather Chem. 

 Assoc. [By-laws, etc.], 1914, PP- <>'^)- — 'J^^^i* yearbook contains the oflicial and 

 provisional methods of analysis of tannin, tanning materials, leather, fats, and 

 oils, and the by-laws of the association. 



