CONTENTS 



PAGES 

 A Synopsis of the Aphididae of California, by Albert 



F. Swain 1-221 



Mutation in Matthiola, by Howard B. Frost 223-333 



Ocean Temperatures, their Relation to Solar Radiation 



and Oceanic Circulation, by George F. McEwen 335-421 



Changes in the Chemical Composition of Grapes during 

 Ripening, by F. T. Bioletti, W. V. Cruess, and H. 

 Davi . .. 423-450 



