METEOROLOGY CLIMATOLOGY. 613 



Metals in plants, A. Ciiarlier (Jour. Hyg., 23 (1898), No. 1154, pp. 523, 524). 



Function of calcium salts, O. Loew {Bot. Centbl., 74 (1898), No. 8, pp. 202-205; 

 9-10, pp. 257-265; abs. in Jour. Hoy. Micros. Soc. [London], 1S9S, No. 5, p. 558). — 

 Although calcium may bo necessary to higher plants, it is not for certain fungi and 

 algae. It is claimed that the nucleus and chlorophyll bodies, except in their earliest 

 stales, utilize calcium in forming protein compounds. The salts of strontium have 

 no injurious action if the plant is supplied with sufficient calcium. Fungi differ 

 in their ability to substitute rubidium for calcium. 



Concerning the origin and transformation of lecithin in plants, J. Stoklasa 

 (Ztschr. Physiol. Chem., 25 (1898), No. 5-0, pp. 39S-405). —This paper treats of the 

 exchange of lecithin and proteids in plants in the dark and lecithin formation in 

 leaves and chlorophyll free cells. 



Water movement in trees, P. Waoner (Natur., 47 (1S98), No. 39, pp. 463,464). 



On the growth of rhizomes, A. Rimbach (Beitr. ll'iss. Bot., 3 (1898), No. 1, pp. 

 177-204, figs. 10). 



Contractile roots and their activity, A. Rimbach (Beitr. Wiss. Bot., 2 (1897), No. 

 l,pp. 1-28, pis. 2). 



Some particular organs from the root of Hedysarum coronarium in relation 

 to Bacillus radicicola and Phytomyxa leguminosarum, G. Mottakeale (Atti R. 

 Inst. Incorag. Naples, 4. ser., 11 (1S9S), No. 4, pp. 7). 



Nitragin, A. P. Aitken (Trans. Highland and Ayr. Soc. Scotland, 5. ser., 9 (1S97), 

 pp. 188-195). — The author gives a popular review of the subject of assimilation of 

 atmospheric nitrogen by bacteria and calls attention to the use of pure cultures of 

 Bacillus radicicola, which is supplied to the trade under the name of Nitragin. The 

 preparation and use of this pure culture have already beeu referred to in this publi- 

 cation (E.S.R.,7,p.906). 



Low temperatures for physiological experimentation, H. B. Humphrey (Jour. 

 Appl. Micros., 1 (1S9S), No. 11, pp. 192, 193). — Describes simple methods for securing 

 low temperatures for physiological experiments. 



Concerning the pathogenesis of saprophytic micro-organisms, H. Vincent 

 {Ann. Inst. Pasteur, 12 (1S98), No. 12, pp. 7S5-798). 



Variation in the lower fungi due to medium, M. J. Ray ( Variations de champig- 

 nons infericurs sous Vinfiuence du milieu. Lille: Le Bigot Frtres, 1898; abs. in Jour. 

 Hyg., 23 (1898), No. 1156, pp. 550, 551). 



Plant forms arising through bud variation, L. Beissner (Sitzber. Niederrhein. 

 Gesell. Bonn: !S9S,p..l3). 



METEOROLOGY— CLIMATOLOGY. 



Report on the work of the station of agricultural climatology 

 at Juvisy during 1897, C. Flammarion (Bui. Min. Agr. [France], 17 

 (1898), No. 4, pp. 775-811, figs. 16). — The work of the year, which was 

 largely a continuation of the work of previous years (E. S. R., 8, p. 26; 

 10, p. 103), included investigations and observations on the relation of 

 the sun to nature, solar rays and the growth of plants, effect of different 

 rays of light on the color of plants, temperature of the air and soil, pho- 

 tography of clouds, solar radiation, rainfall, underground water, and 

 miscellaneous experiments on plants. 



Under the head of the relation of the sun to nature, the author records 

 phenological observations at Paris and at Juvisy, including a record of 

 the time of leafing and flowering of chestnut trees during a series of 

 years and the return of migratory birds. An attempt is made to trace 

 a relation between these recurrent phenomena and the activity of the 



