942 EXPERIMENT STATION RECORD. 



ton industry and treats of the uses of cotton, and of the progress of the cottun indus- 

 try in different countries of the world. A bibliographical index is given, which 

 contains a list of 137 papers, books, etc. , on cotton. 



Hops in their botanical, agricultural, and technical aspect, and as an arti- 

 cle of commerce, E. Gross [London: Scott, Giremcood A Co., J900, pj>. S41,Ji(/s. 78; 

 transL from German by C. Salter). — The history of the hop; the hop plant, its cultiva- 

 tion, preservation, and storage; physical and chemical structure of the hoj:) cone; 

 statistics of production, methods of judging the value of hops, and the hop trade, are 

 considered in a comprehensive manner from the p]uro]iean standpoint. 



History of the potato treated from the historical, biological, pathological, 

 cultural, and utilitarian standpoint, E. Kozi-: (JIi.'<tolri de la ponnne deter re traitee 

 aa.v points de vue historique, biologiqiie, pathologique, ctdtural, et utilitaire. Paris: J. 

 Rothschild, 1898, pp. XII ^ 464, pi- i,Jig-^- 158). — An exhaustive monograph on the 

 potato. Part I discusses the wild potato, giving extended attention to the native 

 home of potatoes and the history of its introduction into England, France, and Con- 

 tinental Europe. Part II takes up the biology, insects and diseases, culture, and 

 use of the potato. The chapter on diseases contains the results of the author's per- 

 sonal observations. The chai)ter on potato uses discusses potato starch, manufac- 

 ture of sirup, dextrin, and spirits from potatoes, in addition to the usual uses as food 

 and forage. 



Experiments in grafting potatoes, E. Laurent {Bui. Roy. Sac. Bot. Belg., 39 

 {1899), pp. 9, 85; a7>.s. //;. T>' Jng. Agr. Geinblou.v, 11 {1900), No. 5, p. ^15). —Experi- 

 ments were made to study the reciprocal influence of grafting light-fleshed and col- 

 ored varieties of potatoes on each other. The Negresse potato, a variety characterized 

 by deep violet-colored tubers, was grafted on Simson, Boule d'Or, and Blue Giant 

 potatoes, varieties with light-colored tubers. In one series cleftgrafting of the vines 

 was practiced and in another a cylindrical piece 15 mm. in diameter was taken from 

 one tuber and replaced by a piece of similar size from the other. The tests extended 

 over a period of 3 years. The results show that the violet coloring matter elaborated 

 in the leaves of the Negresse variety was in no instance stored up in tuljersof the 

 light-fleshed varieties. 



Experiments on the manuring of potatoes in 1899, R. P. Wright {Bid. 

 West rjf Scotland Agr. <_'ol. 1900, No. 4, ]>P- 3-26).- — -The data here reported have been 

 in part summarized fnjm another source (see above). 



The "other side" of ramie {Planting Opinion, 5 {1900), No. 48, p. 816). — A 

 popular note on the practicability of manufacturing fa})ric's from ramie fl])er, show- 

 ing that existing conditions are not promising. 



Sorghum, G. W; Shaw {Oregon Sta. Rpt. 1900, pp. 21-23). — Cooperative experi- 

 ments with a number of varieties of sorghum for sirup making were carried on and 

 the results of analyses of the canes are presented in a table. 



Spelt (Triticum spelta), C. A. Zavitz {Farming World, 18 {1901), No. 19, pp. 

 44s, 449). — Fifteen bushels per acre of grain in the chaff was the best yield obtained 

 by the author in a test of 5 varieties of spelt. The average yield of straw i>er acre 

 was f ton. 



Sugar beets in 1897, M. E. Jaffa {California Sta. Rpt. 1898, pp. 136-142).— 

 Tabulated results of analyses of sugar beets grown in several counties of the State 

 and at the experiment station and the substations during the season of 1897 are 

 reported. The beets at the stations grown on alkali soils, averaging about 5,000 lbs. 

 of soluble salts to the acre, varied in sugar content from 10.92 per i-ent in Dumesmay 

 to 18.12 per cent in Vilmorin Amelior^e, with a purity coefficient of 71.50 and 90.14, 

 respectively. The average sugar content of all samples was 14.10 per cent. The 

 weight i)i sample beets varied from 7.5 to 28.3 oz. 



Some interesting experiments on sugar-beet culture, L. Grandeau {Jour. 

 Agr. Prat., 1900, II, No. 51, pp. 896, 897). — A i)artial l)ook review of a recent work 



