72 PHYSIOLOGY [BoT. Absts., Vol. IX, 



481. Lagatu, H. Sur le role respectif des trois bases: potasse, chaux, magnesie, dans 

 les plantes cultivees. [On the respective roles of the three bases: potassium, calcium, and 

 magnesium, in cultivated plants.] Compt. Rend. Acad. Sci. Paris 172: 129-132. 1921. — 

 These bases are compared as to the amounts required by various agricultural plants and a 

 diagram is constructed comparing the plants in these respects. — C. H. Farr. 



482. Les AGE, Pierre. Plantes salees et periode des anomalies. [Plants grown in salty 

 solutions and the degree of their modification.] Compt. Rend. Acad. Sci. Paris 172: 82-84. 

 1921. — Lepidimn sativum was grown for 10 successive seasons in solutions containing high 

 concentrations of salt and also in solutions of normal concentration. A comparison was made 

 of the height of the plants and of the size and weight of the seeds. Plants grown in salt 

 water are not so tall as those grown in fresh water, unless seeds from plants which grew in 

 salt water are used. In the latter case the plants produced from these seeds are taller if 

 grown in salt water than if grown in fresh water. This difference does not hold in the case 

 of seed size and weight, in which cases the seeds produced on plants growing in salt water are 

 always somewhat smaller and lighter than those grown in fresh water. — C. H. Farr. 



483. Nicolas, G. Contribution a 1' etude du mecanisme de Taction fertilisante du soufre. 

 [A study of the role of sulphur.] Compt^ Rend. Acad. Sci. Paris 172:85-87. 1921. — Flowers 

 of sulphur were added to the soil. Beans grown in soil containing such sulphur showed an 

 increase in the total weight of the seeds produced and in the weight of individual seeds. Very 

 little if any starch was found stored in any part of the plant if grown without sulphur or on soil 

 containing 100 or 300 kg. of sulphur per hectare. But abundant starch was present in both 

 the stem and roots when plants were grown on soil containing 200 kg. of sulphur. The same 

 relation held for peas, except that the optimuift was at 300 kg. Sweet peas and lupines were 

 also studied. The author agrees with Maze and Demolon that sulphur is necessary in chloro- 

 phyll formation. — C. H. Farr. 



484. Serra, Aurelio. Applicazione del metodi microcristallografici al riconoscimento 

 degli elementi minerali contenuti nei vegetali. [Application of microcrystallographic methods 

 to the determination of mineral elements in plants.] Malpighia 28: 558-560. 1920. — 

 The author describes his method of preparing plant tissues for determining mineral crystals 

 contained in them, and also notes the possible value of this line of investigation in the study 

 of the soil requirements of plants. — Edith K. Cash. 



485. Serra, Aurelio. La cristallizzazione negli organ! vegetali. [Crystallization in 

 plant organs.] Malpighia 28: 555-557. 1920. — From the examination of tissues of various 

 plants (Ricinus, Oxalis, Citrus, etc.) the conclusion was reached that crystallization occurs 

 most frequently in aerial portions; and that it is furthered by processes of osmosis and assim- 

 ilation and the evaporation caused by temperature and ventilation — all of the influences 

 which tend to concentrate the solution in which crystalline molecules are deposited. — 

 Edith K. Cash. 



486. Trelease, Sam F. The growth of rice as related to the proportions of fertilizer salts 

 added to soil cultures. Philippine Jour. Sci. 16: C03-627. Fig. 1-5. 1920.— The present 

 study deals with the growth of rice plants in soil cultures to which the 3 elements, phosphorus, 

 nitrogen, and potassium, were added in various proportions. — Albert R. Sweetser. 



487. Willaman, J. J. Comparative salt absorption. [Rev. of : Stiles, W., and F, Kidd. 

 (1) The influence of external concentration on the position of the equilibrium attained in the 

 intake of salts by plant cells. Proc. Pvoy. Soc. London B 90: 44S-470. 1919 (see Bot. Absts. 

 5, Entry 864) ; (2) The comparative rate of absorption of various salts by plant tissue. Proc. 

 Roy. Soc. London B 90: 487-504. 1919 (see Bot. Absts. 5, Entry 851); (3) Stiles, W., and 

 W. Jorgensen. On the relation of plasmolysis to the shrinkage of plant tissue in salt solu- 

 tions. New Phytol. 18: 40-50. 1919 (see Bot. Absts. 3, Entry 434).] Bot. Gaz. 69: 190-191. 

 1920. 



