136 ~ L'ANNEE BIOLOGIQUE. 



Houssay (F.). Sur un indice morphnJngique du vol chez les Oiseaux. 

 (Bull. Mus. Hist. Nat., 438-445.) [197 



Hurthie (K.). Ueher die Anwendbarkeit den PoiseniUeschen Gesetzes auf 

 den Blutslroni. (Avch. gessimmt. Phy.siol.. CLXXIII, 158-171.) 



[Rsultats mathmatiques positifs. J. Arager 



Hutchinson (Henry) Brougham and Clayton (James). On the dcom- 

 position of cellulose by an arobic organism {Spirochaela cytophaga n. sp.) 

 (Journ. Agricult. Se, IX, 143-173, 3 pi., 19181919.) [231 



a) Hyman (L. H.). On the action of certain substances on o.rggen con- 

 suntption. II. Action of potassium cganide on Planaria. (American 

 Journ. of p])ysiol.. XL VI II, 340-371, avri'l.) [158 



b) Physiological studies on Planaria. I. Oxygen consumplion in rela- 

 tion to feeding and starvation. (Ibid., XLIX, 377-402.) [158 



c) On tlw action of certain substances on oxygen consumj)tion. II l. 

 Action of potassium ci/anid on some Clenterates and Annelids. (Biol. 

 Bull., XXX VII, 404-415,) [158 



d) Physiological studies on Pkmaria,. III. Oxygen consiimption in 

 relation lo ge {size) diffrences. (Biol. Bull., XXXVli, 388-403.) [159 



Ide. Hypothse sur les hormones. (C. R. Soc. Biol., LXXXII, 944-946.) [186 



a) Ir-win (M.). Comparative studies on respiration: V. The e/fect of elher 

 on the production of carbon dioxide by animais. (Journ. of Gen. Pliys., I, 

 209-220, 1918.) ' [152 



b) Comparative studies on respiration. VI. Increased production of 

 carl)0n dioxide accompanicd by decrease of acidity. (Ibid., 399-404.) [153 



Itano (Arao) and Neill (James). Influence of temprature and hydrogen 

 ion concentration upon the spore cycle of Bacillus subtilis. (Journ. Gen. 

 Physiol., 1, 421-428.) [210 



Jol (A.). Ueber den Einfluss der Temperatur auf den Sauersio/fverbrauch 

 ivechsehvarmer Tiere. Ein Beitraq zur vergleichenden Physiologie der 

 Atmung. (Zeitsch. Physiol. Chem., CVII, 231-263.) [159 



John (O.), Finks (A. J.) and Paul (M. S.). The nutritive value of 

 coconut globulin and coconut press cake. (Journ. Biol. Chem.. XXXVII, 

 497-502.) [173 



Kahn (R. H.). Beitriige zur Lehre vori Muskeltonus. I. Ueber den Zustand 

 des Muskeln der vorderen Extreuiitien des Frosches iviirend der Umklam- 

 merung. (Arch. gesammt. Physiol., CLXXVll, 294-307.) [197 



Kanda (Sakya). On the reversibility of the heliotropism of Arenicola 

 larvae by chemicals. (Biol. Bull., XXXVI, 149-166.) [243 



Kianizia (I.). Influence of saprophyte bacteria on oxidation in fiigher 

 animais. (Journ. of Physiol., LU, 416-419.) [230 



Kldd (F.) and West (C). The influence of temprature on the soaking of 

 secds. (New. Phyt., XVIII, 35-39, I fig.) [210 



Kolkviritz (R.). Ueber das Schicksal des Chlorophylls bei der hei-bsllichen 

 Laubverfrbung. (Ber. d. deutsch. bot. ges., XXXVII, 2-5.) 



[En automne, les feuilles abandonnent 

 aux organes persistants de la plante la plus grande partie des rserves 

 azotes qu'elles avaient accumules. Or, la chlorophylle ne renferme gure 

 que le l/2i)-l/40 de l'azote ainsi restitu, sa disparition ne constitue donc 

 pour la plante qu'une perte de substance des plus minimes. H. Spinner 



