Includes bibliographies A synopsis of the Aphididae of California, by A. F. Swain.--Mutation in Matthiola, by H. B. Frost.--Ocean temperatures, their relation to solar radiation and oceanic circulation, by G. F. McEwen.--Changes in the chemical composition of grapes during ripening, by F. T. Bioletti, W. V. Cruess, and H. Davi
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