Vol. X 
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/[ARCH 
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1923 
No. 3 
AMERICAN 
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OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMER 
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&'■: APR "4 1920 H 
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CONTENTS 
Note on an indirect effect of spraying potatoes with Bordeaux mixture. 
J. T. Rosa, Jr. 113 
* • ... - 0 j - 
Internal decline of lemons H. Growth rate, water content, and acidity of lemons at 
different stages of maturity.... E. T. Bartholomew 117 
Influence of temperature on the pectinase production of different species of Rhizopus. 
J. L. Weimer and L. L. Harter 127 
The relation of soil moisture to the Fusarium wilt of the tomato. 
IS Edward E. Clayton 133 
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* Studies in the morphology of Riccardia pinguis... Amos M . Showalter 148 
ml 
% • V. 
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■ 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
BY THE 
BROOKLYN BOTANIC GARDEN 
At Prince and Lemon Sts., Lancaster, Pa. 
LONDON AGENTS 
WHELDON AND WESLEY, Ltd. 
. 2, 3, & 4 Arthur Street, London, W. C. 2 
Entered as second-class matter February 21, 1914, at the post office at Lancaster, Pa., under the act of March 3,1879 
IIP 
