REPORT OF THE PRESIDENT, 1922. 27 



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. The autograph of the Arizona ash tree. Garden, vol. 35, 313 (1922). 



. The probable action of lipoids in growth. Proc. Amer. Philos. Soc, vol. 61 (1922). 



MacDowell, E. C. Alcohol and white rats: A study of fertility. Proc. Soc. Exper. Biol, and 



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, and Chester Stock. Occurrence of Pleistocene vertebrates in an asphalt deposit near 



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. Progress in radial velocity observations of long-period variables. Read at Middle- 

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