FIELD CROPS. 637 



Biological studies of green and brown kernels of summer rye, E. Gross 

 {Ztschr. Landiv. Vcrsuchsiv. Osterr., 12 (1909), No. 2, pp. 77/-7'6).— lu 1908, an 

 experiment was undertaken with the green and brown keruels of summer rye. 

 The color was transmitted with considerable certainty. The plants produced 

 by the brown kernels showed shorter straw, longer, looser ears, smaller kernels, 

 and a greater weight per plant but a lower total weight of grain per plant and 

 a lower weight per kernel than did the plants from green liernels. 



Sisal hemp, T. H. Wells (Dept. Agr. N. S. Wales, Farmers' Bui. 25, pp. 17, 

 figs. 3). — The climatic, soil, and cultural requirements of sisal hemp are out- 

 lined and harvesting and milling discussed. 



Select list of references on sugar chiefly in its economic aspects, H. H. B. 

 Meyer (Washington: Library of Congress. 1910, pp. 238). — This exhaustive 

 compilation of bibliographical data has reference more especially to the mate- 

 rial in the Library of Congress and does not include the publications of the 

 state experiment stations. 



The titles are arranged under the three main headings: General and eco- 

 nomic, agriculture, and chemistry and manufacture. Separate sections have 

 been given to some of the more important government publications of Great 

 Britain and the United States, while the articles in consular reports and 

 periodicals have been arranged chronologically. 



Report on tobaccos from Nyasaland, W. I{. Diinstan (Ngasaland Agr. and 

 Forestry Dept. \l'ult.], 1909, \o. 3, pp. .'/). — This rei)()rt on .5 samples of tobacco 

 received from the Agricultural, Forestry and Botanical Department of Nyasa- 

 land includes analyses of 3 of the samples. 



The percentage of nicotine is in all 3 cases lower than the average found in 

 American tobaccos of similar type. The characteristics of aroma and flavor 

 produced when they are burned are also different and will probably prove a 

 difficulty in the way of their finding an extended market in Europe. An ex- 

 amination of tlie ash with reference to the effect of its constituents on the burn- 

 ing quality of tobacco shovr no reasons for reversing tlie general belief that 

 potash is advantageous, lime deleterious only when in excess, magnesia slightly 

 deleterious, and sulphuric acid and chlorin markedly deleterious. 



A text-book on tobacco, C. Werner (New York, 1909, pp. 136, pis. 7). — A 

 historical sketch is followed by a classification of the leaf and products of to- 

 bacco, a statement of the methods of cultivation, curing and manufacture, a 

 chapter on the manufacture of pipes, information on taxation and packages, 

 and a discussion of the tobacco bug and its remedy. Statistics and general in- 

 formation adapted to the needs of the retailer are also given. 



The present status of the tobacco industry, W. W. Garner ( [7^. .S'. Dept. 

 Agr.. liur. Plant Indus. Circ. .'i8. pp. 13). — This circular contains a statement of 

 facts bearing upon the advisability of undertaking tobacco culture in various 

 l(K-alities, especially in new territory in the United States. 



A brief history of the development of a specialized tobacco industry is fol- 

 lowed by a statement of the different classes of tobacco, arising from variations 

 in soil, climatic conditions and methods of production. These types, based on 

 present market requirement, are the cigar, export, and manufacturing types, 

 the first including filler leaf, wrapper, binder leaf, and shade-grown tobacco; 

 the second, dark fire-cured tobacco, Maryland and eastern Ohio, and air-cured 

 loliacco; and the third chiefly Burley tobacco, dark manufacturing tobacco, 

 In-ight flue-colored tobacco, and perique. The more salient facts with regard to 

 each are presented. 



[Protein and water content of seven varieties of wheat], T. E. Keitt 

 (South Carolina Sta. Rpt. 1909, pp. 23, 24).— The protein content of the varie- 



