BOTANY. 



1045 



Chem., 37 {1903), No. 5-6, pp. 508-512).— X study of the cleavtige products oljtained 

 when zein is hydrolized with hydrochloric acid. 



Tests and reagents, chemical and microscopical, known by their authors' 

 names, together with an index of subjects, A. I. Coiix [Xcic York: John Wilei/ 

 & S'on.%- London: Chapmamk Hall, Ltd., 1903, pp. III-\-383). 



Report of the chemists, C. H. Jones and B. O. White ( Vermont Sta. lipt. 1902, 

 pp. 268-21 1). — Analyses of 34 miscellaneous samples, including fertilizing materials, 

 wood a.shes, muck, and feeding stuffs arc r('])()rted. 



Report on the progress of physical chemistry and physics during the year 

 1902, M. RuDOLPHi {CJu'ui. Ztg., 27 (1903), No. 28, pp. 319-323).— A review with 

 luinierous references to literature. 



Proceedings of the nineteenth annual convention of the Association of 

 Official Agricultural Chemists ( U. S. Dept. Agr., IHvhion of Chmiixlrii Ihil. 73, 

 pp. 187, pi. 1, figs. 5) . — This account of the proceedings of the meeting held in Wasli- 

 ington October 2-4, 1902, is edited by the secretary of the association, H. W. Wiley. 

 For a summary of the proceedings see E. S. R., 14, pp. 107-116. A memoir of the 

 late Robert C. Kedzie, by L. S. Munson, and an article on the <leterniination of 

 glucose by E. Gudeman (E. S. R., 14, p. 224) have been included. 



BOTANY. 



The variation of reserve carbohydrates in the stem and roots of ligneous 

 plants, Leclerc du Sablon [Compl. Bend. Acad. Sci. Parh, 135 {1902), No. 20, pp. 

 866-868). — The author has made a study of the sugar and starch which are found in 

 the interior of ligneous plants throughout the course of the year. In order that his 

 results might be comparable, plants of the same age and as nearly as possible the 

 same condition were grown under identical conditions. At intervals of about 40 days 

 specimens were removed, thoroughly washed, and the stems and roots examined for 

 their reserve carbohydrates. The variation observed in the stems and roots of chest- 

 imt seedlings is shown in the following table: 



Variation in the carbohydrates in. the stems and roots of chednul trees. 



From this table it is shown that during the winter, when growth is apparently 

 suspended, the total reserves diminish gradually, and in general the root contains 

 more reserve material than the stem. This difference, however, is more apparent in 

 autumn and winter than in the summer. The roots c<;)ntiiined more sugar during 

 the period of active growth, and the stems contained their highest proportion during 

 the resting period of the plant. Pear, peach, quince, and alder trees were examined 

 in a similar way, and the results ol)tained are comparable with those given above. 



A study of the reserve carbohydrates of some palms, E. Lien.\kd {Compt. 

 Rend. Acad. Sci. Paris, 135 {1902), No. 15, pp. 593-595) .—X study is reported on 

 certain reserve carbohydrates found in the endosperm of a number of palms. The 



