No. 4, February, 1922] PHYSIOLOGY 297 



1928. Peters, R. A. The substances needed for the growth of a pure culture of Colpldlum 

 colpoda. Jour. Physiol. 55: 1-32. 1921. — This protozoan was kept in a pure tube-culture for 

 a year in a medium of "glass-distilled water, calcium, potassium and sodium chlorides, mag- 

 nesium sulphate, and ammonium glycero-phosphate." Ammonium phosphate and chloride 

 could not be omitted without inhibition of growth. When magnesium and potassium were 

 left out of quartz-tube cultures growth stopped. The omission of sodium, calcium, and 

 sulphate separately had no effect. Uranium could not be substituted for potassium. Amino 

 acids may be used in place of ammonium as a nitrogen source. — Ernest Shaw Reynolds. 



METABOLISM (GENERAL) 



1929. Albertoni, I., e G. Bosinelli. Composizione chimica delle paglie di diverse 

 variety di frumento coltivate nelle stesse condizioni. Loro valore foraggero. [Chemical com- 

 position and nutritive value of the straw of different varieties of wheat grown under the same 

 cultural conditions.] Staz. Sper. Agrarie Ital. 54: 129-13(3. 1921. — The investigation was 

 undertaken to determine whether the straws of different varieties of wheat differed chemically, 

 and whether such differences can be correlated with varietal characteristics. [The 3rd part 

 of the stud}', which discloses the percentage of digestible substances in these straws, need 

 not here be abstracted.] Pure line selections were studied after careful cleaning to eliminate 

 weed parts and subjected to the following determinations: moisture, protein substances, 

 fats, nitrogen-free extractives, crude fiber, ash; also CaO and P2O5. The varieties studied 

 were the following: Cimone, Normale, Cologna 12, Rieti-I and Rieti-II, Masoline, Gentile 

 rosso-58, Gentile rosso-48, Bordeaux red, Inallettabile-38, Poulard of Australia, Turgido nero, 

 and Duro Portonuovo. The conclusions drawn are the following: The influence of leaves, 

 the height of the culm, etc., upon the crude fiber content should be kept in mind when the 

 latter is considered in relation to the lodging of the straw. The term crude fiber as it is here 

 used does not indicate all nor always the same chemical substance or substances of the plant 

 skeleton, and this fact should not be overlooked when this determination is taken as an indi- 

 cation of stiffness of mature straws. It is the insoluble residue after treatment with dilute 

 H2SO4 and NaOH, and botanically it constitutes the greater portion of the cell walls; never- 

 theless, it does not include all the cellulose nor all the pentoses nor all those substances grouped 

 under the term lignin, since these are not insoluble in the solvents used. Nevertheless, it 

 appears that the varieties more resistant to lodging have culms and leaves with a greater crude 

 fiber content. According to the authors this fact should not be considered essential. — 

 A. Bonazzi. 



1930. Anderson, R. J. Acerin. The globulin of the maple seed (Acer saccharinimi). 

 Jour. Biol. Chem. 48: 23-32. 1921. — The principal protein of the seed of this maple has been 

 isolated and purified and the name acerin proposed. It is a globulin. When purified it is a 

 nearly white heavy powder which on combustion leaves no weighable ash. Much of the basic 

 nitrogen is present as lysine. — G. B. Rigg. 



1931. Bell, W. H. A method for the detection of phenols produced by bacteria. Jour. 

 Infect. Diseases 29: 424—428. 1921. — A method is described for the detection of phenols in 

 bacterial cultures in concentrations of 1:500,000. — Selman A. Waksman. 



1932. Bridel, M., et R. Arxold. Sur une methode permettant Tapplication, avx vege- 

 taux du proc§de biochimique de recherche du glucose. [A biochemical test for glucose applicable 

 to plants.] Compt. Rend. Acad. Sci. Paris 172: 1434-1436. 1921. — A method is given for 

 testing for glucose in plant extracts. It is based on the previous work of Bourquelot and 

 Bridel, who used emulsin to secure the /3 methylglucoside. — C. H. Farr. 



1933. Czapek, Friedrich. Zur Kenntnis der silberreduzierenden Zellsubstanzen in 

 Laubbalttem. [Silver-reducing cell substances in foliage leaves.] Ber. Deutsch. Bot. Ges. 

 38: 246-252. 1920. — This paper was called forth by ]\Iolisch's report (1) of the deep black 

 coloration of chloroplasts of living cells treated with 1 /lO-l per cent solutions of silver nitrate, 

 (2) in particular, that the silver-reducing substance undergoes a change by which it loses its 



