804 EXPERIMETsTT STATION BECOED. [Vol. 36 



The hairs of the seed coating of some of the other species of Malvacese are 

 considered to be very similar to cotton fiber. The possibility of successful cross- 

 ings between Gossypium and other Malvacese is suggested. 



Data concerning the character of seeds of different varieties of cotton, 

 S. L. IvANOv and E. I. Moshkova (Soobshcli. Biuro Chastn. East. [Petrograd], 

 2 (1915), No. 4. pp. S-35). — From an investigation of several species and 

 varieties of Gossypium, arranged by the Russian Ministry of Agriculture with 

 regard to the cotton industry in Russian central Asia, it was found that, con- 

 sidering the quality of seeds from the standpoint of oil content and press cake 

 and the quality of fiber, Gossypium hirsutum has a much greater practical value 

 than any other variety studied. It is indicated that the cultural area of 

 G. hirsutum is gradually extending, while that of G. herbaceum is gradually 

 diminishing. 



Tables giving detailed analytical results of a number of cotton seeds are 

 appended. 



Globulin obtained from seeds of Gossypium hirsutum, A. PomaskiJ 

 (Soobshch. Bvuro Chastn. Rast. [Petrograd], 2 {1915), No. 2, pp. 3-12).— The 

 »iuthor finds that globulin is the chief constituent of the protein substances of 

 the cotton seeds. The globulin of G. herbaceum and that of G. hirsutum are 

 probably identical. The proteins of the cotton seed are considered to be highly 

 digestible, the coefficient of digestibility with the gastric juice of the dog being 

 found to be from 99 to 100 per cent. The value of the press cake as a feeding 

 stuff is indicated. 



Leucin anhydrld, a product of the water hydrolysis of protein at high 

 temperatures, S. S. Gbaves, J. T. W. Marshall, and H. W. Eckweilek (Jour. 

 Amer. Chem. Sac, 39 (1917), No. 1, pp. 112-114). — The following percentages 

 of leucin anhydrid were extracted with ether from the brown, sirupy liquid 

 resulting from hydrolysis with water in an autoclave at from 180 to 200° G. 

 for 16 hours : Casein, 1.5 ; egg albumin, 1.2 ; edestin, 1.2 ; Witte's peptone, 1 ; 

 silk, 0.09; gelatin, 0.04. The material extracted by the ether was purified by 

 recrystallization from hot acetone. An experiment to determine the source of 

 the leucin anhydrid is reported and indicates that the anhydrid is not built 

 from any leucin separated by the hydrolysis. 



An iodin addition product of cumarin, A. W. Dox and W. G. Gaessleb (Jour. 

 Amer. Chem. Soc., 39 (1917), No. 1, pp. 114-117).— The authors at the Iowa 

 Experiment Station describe the preparation of an iodin addition product of 

 cumarin containing approximately 33 per cent of iodin. Analysis of the product 

 showed that no substitution by the iodin occurred. 



Carbon monoxid, occurrence free in kelp (Nereocystis luetkeana), S. C. 

 Langdon (Jour. Amer. Chem. Soc., 39 (1917), No. 1, pp. 149-156, figs. 3). — Ex- 

 perimental data are reported which show that the gas in the giant kelp (N. 

 luetkeana) contains carbon monoxid in quantities varying considerably In 

 different samples. Carbon dioxid is only occasionally present, and in minute 

 quantities. Previous work which demonstrated that the quantities of carbon 

 dioxid and oxygen varied with the time of day has not been confirmed. 



A-ncient Irish oak, P. A. E. Richards (Analyst, 4I (1916), No. 487 pp. SOS, 

 SO4). — Data relative to the general composition and mineral constituents of a 

 number of Irish oaks taken from various districts are submitted. 



Photomicrographs of crystallizable chemical salts, A. W. Doubledat (Bos- 

 ton: Research Publishing Co., 1916, pp. V+2S6, figs. 115). — This volume con- 

 tains 114 photomicrographs of typical crystalline forms of various chemical 

 compounds known to exist in the body tissues and fluids under normal and 

 pathological conditions. Brief notes on crystallization and a description of the 

 six crystal systems are included. 



