290 PHYSIOLOGY [Box. Absts., Vol. VI, 



GROWTH, DEVELOPMENT, AND REPRODUCTION 



2006. Besredka, A. L'oeuvre de Metchnikoff sur la senescence. [The work of Metchni- 

 koft" on senility.] Bull. Inst. Pasteur 17: 209-223. 1919. — This is an extract from the book by 

 Besredka which is published under the title: Histoire d'une idee. It covers the whole 

 activity of Metchnikoff in the broader zoological phase of the subject and therefore contains 

 material of interest to the physiologist. The great importance to be ascribed to phagocytosis 

 in pathological conditions and in senility is here emphasized, but the secondary nature of this 

 phenomenon is insisted upon. The role of intoxicating agents is treated, and the function 

 of the intestinal flora in intoxication is discussed in the light of the work issuing from the 

 laboratory of Metchnikoff on the subject of aseptic life. — A. Bonazzi. 



2007. Bessey, E. A. The effect of parasitism upon the parasite — a study in phylogeny. 

 Michigan Acad. Sci. Ann. Rept. 21: 317-320. 1919.— See Bot. Absts. 6, Entry 1934. 



2008. Friesner, Ray C. Periodicity of elongation and cell division. (Preliminary note.) 

 Michigan Acad. Sci. Ann. Rept. 21:233-234. 1919. — Roots of Curcurbita Pepo, Lupinus 

 albus, Pisum sativum, Zea everta, Vicia faba, and Allium cepa were used. Elongation occurs 

 usually in waves three hours apart. There are also secondary waves from two to four in 

 number every 24 hours. Maximum elongation alternates with maximum cell division. — 

 Richard de Zeeuw. 



2009. Harlan, Harry V., and Stephen Anthony. Development of barley kernels in 

 normal and clipped spikes and the limitations of awnless and hooded varieties. Jour. Agric. 

 Res. 19: 431-472. 13 fig. 1920. 



GERMINATION, RENEWAL OF ACTIVITY 



2010. Green, Frederick J. Germinative capacity of pine seed. Quart. Jour. Forest. 

 14: 140-141. 1920.— See Bot. Absts. 6, Entry 554. 



RADIANT ENERGY RELATIONS 



2011. Coupin, Henry. Sur le temps que la chlorophylle met a se developper a son maxi- 

 mum d'intensite a la lumiere. [On the time required for chlorophyll to develop to its maximum 

 intensity in light.] Compt. Rend. Acad. Sci. Paris 170: 753-754. 1920. — This is a continua- 

 tion of the previous studies appearing on page 403 of this volume. A determination is made 

 of the exposure to diffuse light required in order that etiolated seedlings may become as 

 green as those grown in light. It is found, for example, that the leaves of sugar corn require 

 only one day, whereas the hypocotyl of chicory requires fifteen days. — C. H. and W. K. Farr. 



2012. Harvey, E. Newton. The nature of animal light. 182 p., 35 fig. J. B. Lippincott 

 Co. : Philadelphia, 1920. — While this book deals with luminescence in animal forms, it is of 

 general interest to physiologists and at the same time includes also a list of luminous organ- 

 isms including both animal and plant forms. — B. M. Duggar. 



TOXIC AGENTS 



2013. Coons, G. H., and Genevieve Gillette. Phenol injury to apples. Michigan 

 Acad. Sci. Ann. Rept. 21: 325-329. PI. 14- 1919— See Bot. Absts. 6, Entry 1938. 



2014. Coons, G. H., and H. H. McKinney. Formaldehyde injury to wheat. Michigan 

 Acad. Sci. Ann. Rept. 21: 321-324. 1919.— See Bot. Absts. 6, Entry 1939. 



2015. Crocker, William. Zinc and growth of Aspergillus niger. [Rev. of: Steinberg, 

 R. A. A study of some factors influencing the stimulative action of zinc sulphate on the growth 

 of Aspergillus niger. I. The effect of the presence of zinc in the cultural flasks. Mem. 

 Torrey Bot. Club 17: 287-293. 1918. (See Bot. Absts. 1, Entry 744.)] Bot. Gaz. 68: 391-392. 

 1919. 



