No. 1, July, 1920] PHYSIOLOGY 



other conditions. (G) Accretions of new material include the absorption of talts which tend 

 to restrict hydration and the incorporation of amino-compoundB. Bo-called autrien 

 do not constitute food but may act as catalysts or relea i i of energy in other 

 and as controls. (7) The enlargement of cells is almosi entirely by the swelling whiob 

 suits from hydration in their earlier stages, and later the enlargement of the syncretic cavi- 

 ties in the colloidal structure is followed by the distending or stretching action of osm< 

 pressures in the vacuoles thus formed. (8) Illustrations are afforded by record of growth of 

 leafy stems, joints of cad i, fruits of Solatium, and trunks of trees. — .t. //. Chiver$. 



1561. Molisch, Hans. Uber das Trelben von Wurzeln. [Forcing of roots.] Bitsungsber. 

 K. Akad. Wiss. Wieu (Math.-Nat. Kl.) 126: :i 12. PI. 1 9, fig. I ',. L917.— The author a 

 freshly cut three year old twigs of Salix, Populus, Philadelphia coronaritu, and Viburn 

 opulus. Adventitious roots were freely formed by these branches after their leaf and Bo 

 buds were forced by exposure to tobacco or paper smoke or a warm wider bath in late autumn. 

 — It'. ('. Muensch r, 



1562. Naoai, Isabtjeo. The correlation in the differentiation of sex in the fern prothallia. 

 Bot. Mag. Tokyo 33: 157-170. 1919. — A continuation of the author's studies of the effed 

 light and nutrient media on the development of sex organs in ferns. Spores were sowed on 

 0.25 per cent, 0.5 per cent, and 1 per cent Knop's solution and grown in good light and in weak 

 light. Cultures in weak solutions and weaker light produce antheridia but no archegon 

 Better light and stronger media induce the formation of an apical meristem followed by 1 e 

 development of archegonia. Though the prothallia of Blrchnum nipponicum are monoeceous 

 in nature, they are strongly dioecious in these cultures. The author argues that the evider 

 indicates the presence in each protoplast of a determiner for antheridia and one for apical 

 meristem and archegonia, one of which is prevented from functioning by an inhibitor. — 

 Leonas I. Burlingame. 



1563. Zeller, S. M., H. Schmitz, and B. M. Dugoar. Studies in the physiology of the 

 fungi VII. Growth of wood-destroying fungi on liquid media. Ann. Missouri Bot. Card. 6: 

 137-142. 1919. — Experiments undertaken to determine (1) which wood-destroying fungi arc 

 adapted to growth on liquid media, (2) what liquid media are suitable for their growth, an ' 

 (3) the influence of the hydrogen ion concentration of the media indicate that (1) m; 

 wood-destroying fungi are not suitable for growth experiments with liquid media; (2) t! 



is a decided indication of the desirability of selecting a specific medium for each fungus; and 

 (3) that the H-ion concentration does not seem to be the only limiting factor in growth. — 

 S. M. Zeller. 



MOVEMENTS OF GROWTH AND TURGOR CHANGES 



1564. Crocker, William. Turgor movements. [Rev. of: Blackman, V. H., and S. G. 

 Paine. Studies in the permeability of the pulvinus of Mimosa pudica. Ann. Botany 32: 

 69-85. 1918 (See Bot. Absts. 1, Entry 175).] Bot. Gaz. 67:278. 1919. 



1565. Crocker, William. Phototropism. [Rev. of : Parr, Rosalie. Response of Pilo- 

 bolus to light. Ann. Botany 32 : 177-205. 1918.] Bot. Gaz. 67 : 272-273. 1919.— The author is 

 strongly commended for an excellent piece of quantitative work in a field in which such work 

 has been largely absent. [See Bot. Absts. 1, Entry 1656]. — H. C. Cowles. 



1566. Crocker, William. Geotropism and phototropism. [Rev. of: Van Ameijdex, 

 U. P. Geotropism and phototropism in the absence of free oxygen. Recu6il Trav. Bot. Xcer- 

 land. 14: 149-218. 1917. PL 15-16, fig. 1.) Bot. Gaz. 67: 1S4. 1919. 



1567. Crocker, William. Statolith starch. [Rev. of: Zoli.ikofer, Clara. Uber das 

 geotropische Verhalten entstarkter Keimpflanzen und den Abbau der Starke in Gramineen- 

 koleoptilen. Ber. Deutsch. Bot. Ges. 36: 30-38. 1918 (See Bot. Absts. 2, Entry 607).] Bot. 

 Gaz. 67:520. 1919. 



