428 EXPERIMENT STATION EECORD. 



Soils and fertilizers, T. E. Kf.itt (South Carolina Sta. Bui. 151, pp. 3-36). — 

 This bulletin describes the main soil tj'pes of South Carolina and discusses their 

 fertilizer requirements and management. The source, composition, mixing, 

 and use of fertilizers are also discussed. 



Inspection and analyses of cotton-seed meal, season 1909—10, W. F. Hand 

 ET AL. (Mississippi Sta. Bui. 128, pp. 31). — This bulletin contains analyses of 

 223 samples of cotton-seed meal collected by regular inspectors and received 

 from the oil mills. The analyses show that " manufacturers have usually sup- 

 plied their trade with meal equal in quality to that guarantied." 



AGRICULTURAL BOTANY. 



Experimental studies in the physiology of heredity (Rpts. In Evolution 

 Com. Roy. Soc. [London^, 1909, Ao. 5, pp. 79, pis. 3, figs. 2). — This consists of 

 the following papers: Further Observations upon the Inheritance of Flower 

 Color in AntinJiinum majus and Note on the Physiological Interpretation of 

 the Mendeliau Factors for Color in Plants, by Miss M. Wheldale; Hybridiza- 

 tion Experiments with Mirabilis jalapa, by Dorothea C. E. Marryat; and Inherit- 

 ance of Color and of Supernumerary Mammie in Guinea Pigs, with a Note on 

 the Occurrence of a Dwarf Form, by Igerna B. J. Sollas. 



Physiologically arid habitats and drought resistance in plants, A. Dach- 

 NOWSKI {Bot. Gaz., 49 (1910), No. 5, pp. 325-339). — In previous publications 

 (E. S. R., 20, p. 7.38; 22. p. 22) the author has shown the physiological effect of 

 bog water and bog soil, from which it appears that the toxicity of the habitat 

 exerts a marked influence in determining the character and distribution of 

 plants. In the present paper he gives an account of additional studies on the 

 effect of the habitat on drought resistance, basing his studies on the conditions 

 previously noted. 



It was found that in the bog habitat the ratio between the amounts of water 

 absorbed and transpired is never constant, varying most during the growing 

 season, but it must always be more than unity if the plants are to survive 

 periods of extreme physiological drought during the summer and autumn 

 months. 



In considering the limiting environmental factors, it is stated that structural 

 differences do not play much part in enabling plants to exist in bog conditions, 

 but the conclusion is reached that the real determining factor in the bog habi- 

 tat is the ratio of the possible rate of water absorption to the rate of transpira- 

 tion, and that the toxicity of the bog habitat exerts a primary role in bringing 

 about bog conditions. 



As a possible application of the investigations it is shown that the toxicity 

 of the habitat is not the same for all agricultural plants and forest trees, and 

 from the standpoint of economic importance it is believed that certain species 

 are better adapted to withstand the effects of this tyix? of soil than others. 

 This offers an opportunity for studies to increase the utility of these soils. 



The green parts of plants and light, T. Lohb (Waturw. Wchnschr., 25 

 (1910), lYo. i//, pp. 209-21Ji).—A critical review is given of recent contributions 

 to the subject of the relationship of light to the green parts of plants, with par- 

 ticular attention to the perception of light as described by Haberlandt. 



The coloration of red grapes and the autumn coloration of leaves, J. La- 

 BORDE (Proc. Verb. Soc. Sci. Phys. et Nat. Bordeaux, 1908-9, pp. J-J-iT).— In a 

 previous publication (E. S. R.. 20, p. 753) the author has shown that certain 

 tannins acted upon by dilute hydrochloric acid give a reddish coloring material, 

 and an explanation of this has been sought. 



