Vol. XXXI 
SEPTEMBER 1, 1925 
No. 5 
JOURNAL OF 
AGRICULTURAL 
RESEARCH 
CONTENTS 
Page 
The Minimum Temperature for Growth of the Date Palm and the Absence of a 
Resting Period ------------- - 401 
SILAS C. MASON 
Partial Thermostasy of the Growth Center of the Date Palm ----- 415 
SILAS C. MASON 
The Inhibitive Effect of Direct Sunlight on the Growth of the Date Palm - 455 
SILAS G. MASON 
An Improved Method of Computation of Net-Energy Values of Feeding Stuffs - - 469 
MAX KRISS 
Identity of the Mealybug Described as Dactylopius calceolaria© Haskell - 485 
HAROLD MORRISON 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE 
WITH THE COOPERATION OF THE ASSOCIATION 
OF LAND-GRANT COLLEGES 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1925 
