524 EXPERIMENT RTATTON RECORD. [Vol. 4?. 



3917 and studie'l an orj^anisni wliirli lias tlio proporty, anions others indicated, 

 of destroying certain complex polysaccliarids. Tlie organism is considere<l a 

 new species and named P.sciifiiinioiifis ])<)lii!«i(r]i(tvi(]<trnin. 



The breeding of fungi on highly concentratod cane sugar solutions and 

 the question of chondriomes, N. Iii:zssoNOF {Ber. Dent. Rot. Gesell., 37 

 (1919), No. 2, pp. 136-1 J/S, pi. 1). — An account of studies on several fungi con- 

 cludes with the statement that icnring mold fungi on strong sugar solutions 

 tends to the development of sexuality. Discussion is also given oJ" the char- 

 acters and significance of the cliondriomes and various related structures. 



Conidia-forming materials, F. Boas (Err. Dcuf. Bot. Gn^cU., S7 {1919), A'o. 

 1, pp. 57-62). — Tliis is a brief study of the relation between the components of 

 the substratum and conidia formation as regards rapidity and amount, in case 

 principally of AxpcrdiUit.H iih/rr and A. ffhiuciift. The degree of dissociation 

 appears to be significant in this connection. 



The sexuality of Phyconiyces nitens, G. Orban (Bot. Ccntbl., BcUieftc, 36 

 (1919), 1. AM., No. 1, pp. 1-59, pis. 2, figs. 20).— It is stated that P. nitens 

 presents a plus and a minus strain, the mycelium being distinguishable through 

 differences in such characters as germination period, growth, and starch pro- 

 duction. 



Auto-tox'icity in Aspergillus niger, F. Boas (Ber. Dent. Bot. Gesell., 37 

 (1919), No. 1, pp. 63-65). — Noting manifestations of auto-toxicity in A. nUjm- 

 grown on a suitable substratum, the author observes that other fungi, as Botry- 

 tis cinerea and Oidium under comparable conditions, gave negative results. 



Studies on plant colloids. — VIII, Cellulose dextrins, M. Samec and J. 

 Matula (Kolloidchem. Beihefte, 11 (1919), No. 1-2, pp. 37-73, figs. 3).— An ac- 

 count is given of a study of several cellulose dextrins as regards their physico- 

 chemical characters, also of the influence of diastase on these bodies, the results 

 being presented in tabular form with discussion. 



Demonstration of lipoids in plant cells, F. Czapek (Ber. Dent. Bot. Gesell., 

 37 (1919), No. 5, pp. 207-216). — A discussion is given of methods for the denn n- 

 stration of lipoids in plant cells and of work done with different plants. 



The passage of undissolved substance from the cell nucleus, M. von Der- 

 schau (Arch. Zcllforsch., IJf (1915), No. 2, pp. 255-277, pis. 2).— This is a 

 synthetic account, with discussion, of studies on the nature and behavior of 

 certain nuclear bodies and sub.stances in different plants. 



Size and function of cell nuclei, particularly with reference to classifi- 

 cation, E. Klienebekger (Bot. Centbl., Beihefte, 35 (1918), 1. AM, No. 2, pp. 

 219-278, pi. 1, figs. 3). — As a result of the studies here noted, it is claimed that 

 both the size and structure of the cell nuclei are significant in the detection of 

 close relations among plants. 



Effect of reaction of solution on germination of seeds and on growth of 

 seedlings, R. M. Salter and T. C. McIlvatne (Jour. Agr. Research [U. S.], 19 

 (1920), No. 2, pp. 73-9S, pi. 1, figs. 5).— A study was made at the West Virginia 

 Experiment Station to determine the effects of reaction as made by H-ion con- 

 centration upon the growth of the seedlings of wheat, soy beans, corn, and 

 alfalfa in solution culture and upon the germination of the seeds of wheat, soy 

 beans, corn, alfalfa, and red clover. 



Citric acid was found unsuitable for adjusting the reaction of culture solu- 

 tions for such work, but a satisfactory method was found in the addition of a 

 uniform amount of ' orthophosphoric acid to all cultures and increasing the 

 amounts of sodium hydroxid to successive cultures. Maximum H-ion concen- 

 trations for the growth of seedling were determined. The hydroxyl-ion was 

 found apparently more harmful than the H-ion in equivalent concentrations. 

 Measurements of reaction of solutions before and after the growth of wheat 



