No. 1, May, 1921] PHYSIOLOGY 91 



reaction of ammonium salts.] Pharm. Weekblad 57: 1345-1348. 1 fig. 1920. — The author 

 believes that contrary to the statement of O. Loew "that in the presence of formaldehyde and 

 of an ammonium salt no hexamethylenetetramine is formed in the living protoplasm" this 

 product is formed, because he found by microchemical experiments that not only ammonia 

 but also ammonium salts form hexamethylenetetramine. The test was made with iodine- 

 potassium iodide solution by which characteristic microscopic crystals are produced. — 

 H. Engelhardt. 



METABOLISM (NITROGEN RELATIONS) 



634. AuBEL, E. Influence de la nature de I'aliment carbone sur I'utilization de I'azote 

 par le Bacillus subtilis. [The influence of the carbon nutrients on the utilization of nitrogen 

 by Bacillus subtilis.] Compt. Rend. Acad. Sci. Paris 171: 478-480. 1920. — More nitrogen is 

 absorbed when this organism is grown on glycerine than when on glucose or levulose. — 

 C. H. Farr. 



635. Bos, E. C. VAN den. Action stimulante des sels azotes sur la germination de I'Ama- 

 rantus caudatus. [Stimulation of germination in Amarantus caudatus by nitrogen-containing 

 salts.] Recueil Trav. Bot. Neerland. 17: 69-120. 1920.— At a temperature of 15-16°C. the 

 seeds germinate only in darkness. When the maximum temperature is almost reached, they 

 germinate at 43-45°C. in the light only, though the seedlings never attain their full develop- 

 ment. — In a Knop solution the germination was found to be more rapid, which suggested the 

 action of nitrogen. A solution of 0.1 m. KNO3 had an unfavorable influence, while 0.001 m. 

 KNO3 was more favorable. In some salts NO3 proved to be stimulating whereas CI and 

 S04-ions were not. — Solutions of KSCN of 0.4 m. gave a maximum germination of 80 per cent. 

 Such compounds as asparagin and urea did not stimulate germination. — J. C. Th. Uphof. 



636. Lewis, W. C. McC. [Rev. of : Robertson, T. Brailsford. The physical chemistry 

 of the proteins, xv + 483 p. Longmans, Green & Co. : New York, 1918.) Sci. Prog. [London] 

 14:502-503. 1920. 



637. LtJERS, H. tJber die Identitat von Hordein und Bynin. [The identity of hordein 

 and bynin.] Biochem. Zeitschr. 96: 117-132. 1919. — Hordein of barley and bynin of malt 

 were hydrolyzed according to the methods of Van Slyke to determine the relationships of 

 these products. The author's analyses lead him to conclude that bynin is not a new protein 

 differing from hordein in its properties, as Osborne believes, but that it is more likely a 

 residuum. — IF. W. Bonns. 



638. Pheiler, W., und F. Engelhardt. Ueber den Nachweis von Rizin in Fiittermitteln 

 mit Hilfe der serologischen (Prazipitations — Komplementablenkings und Konglutinations) 

 Methoden sowie der Hamagglutination. [The identification of ricin in feedstuffs by means of 

 serological methods, as well as the haemagglutination method.] Landw. Jahrb. 35: 561-583. 

 1919. — The author has investigated especially the method recommended by Miessner and 

 Rewald and condemned as not specific by Bierbaum. The author finds that the method is 

 highly specific, when a proper antiserum is used. Investigations on the other methods are 

 reported but the author concludes that properly used the precipitation method is specific and 

 convenient. — .4. J. Pieters. 



639. Rousseaux, Etjg., et Sirot. Les matieres azotees et I'acide phosphorique dans !a 

 maturation et la germination du ble. [The nitrogen compounds and phosphoric acid during the 

 ripening and germination of wheat.] Compt. Rend. Acad. Sci. Paris 171:578-580. 1920. — 

 During the ripening of wheat the proportion of nitrogen to phosphoric acid, PaOe, remains 

 about constant. Both decrease until early July, whereafter they increase to some extent. 

 Acidity is found to maintain a considerable decrease until the last of July. — C. H. Farr. 



640. Sertz, H. tJber die Veranderung der Stickstofformen in keimender Lupine, insbe- 

 sondere iiber das Verhaltnis von formoltitrierbarem und Formalinstickstoff zum Gesamtstick- 



