Vol. XXVII 
JANUARY 19, 1924 No. 3 
* • ■ ’ ' / ' ‘ ' 
JOURNAL OF 
AGRICULTURAL 
RESEARCH 
CONTENTS 
Page 
Photoperiodism In Relation to Hydrogen-Ion Concentration of 
the Cell Sap and the Carbohydrate Content of the Plant - 119 
W. W. GARNER, C. W. BACON, and H. A. ALLARD 
(Contribution from Bureau of Plant Industry) 
On the Anatomy of the Sweet Potato Root, with Notes on 
Internal Breakdown - - - - - - - - 157 
ERNST ARTSCHWAGBR 
(Contribution from Bureau of Plant Industry) 
The Influence of Low Temperatures and of Disinfectants on the 
Eggs of Ascaris lumbricoides - - - r - - 167 
ELOISE B. CRAM 
(Contribution from Bureau of Animal Industry) 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE 
WITH THE COOPERATION OF THE ASSOCIATION 
OF LAND-GRANT COLLEGES 
WASHINGTON, D. C. 
GOVERNMENT PRINTING OFFICE, 
. 1#M 
