

vi CONTENTS [VOLUME LVI 
Temperature coefficients in plant geography and 
climatology ots three figures) 
urton Edward Tilson and Grace Johnson Livingston 
Apogamy in rece (with plates XIII and XIV). Lula Pace 
The tepary, a new cultivated legume from the 
southwest (with eleven figures) - - George F. Freeman 
A comparison of the American brown-rot beanies 
with Sclerotinia fructigena and S. cinerea of 
Europe (with six figures) - - - - W. A. Matheny 
Osmotic pressure in potatoes. Contributions from 
the Hull Botanical Laces 177 wicae four 
figures) - M. A. Brannon 
The castor bean a and Siete air. a 
tributions from the Hull Botanical <p cuaaid 
- - E. M. Harvey 
Botanical ae and the cochlea of recent 
coastal subsidence (with nine figures) - Douglas Wilson Johnson 
Western plant studies. II - Aven Nelson and J. Francis Macbride 
Chemical and physical changes in geotropic stinau- 
lation and response. Contributions from the 
Hull retomuagse ome 179 (with six 
figures . Eva O. Schley 
Studies in ihe genus Bidens, i Contin 
from the Hull Botanical Laboratory 
Earl E. Sher ff 
Some Alaskan lichens (with two fear 
“ - R. Heber Howe, Jr. 
BRIEFER ARTICLES— 
The use of celloidin membranes for the demonstra- 
tion of osmosis (with three figures) 
-  =Gilbert Morgan Smith 
Imbedding and warming stand peas two figures) L. Knudson 
Included cytoplasm in fertilization - Margaret C. Ferguson 
Henry Willey (with portrait) ae es coe dt. Ml. 
CURRENT LITERATURE - 
For titles of book reviews see a under 
author’s name and reviews 
Papers noticed in “Notes for Students” are 
indexed under author’ S name and subjects 
DATES OF PUBLICATION 
0. 2, August 14; No, : 
15; No. 6, December 
No. 1, July 16; N. 
15; No. s, Reena: 
PAGE 
349 
376 
449 
469 
502 
~ 79; 153, 230, 341, 443, 504 
— 17; No. 4, October 
yas 

