Abstract :
Four National Prizes for papers presented during 1929 have been awarded by the Committee on Award of Institute Prizes. These prizes consist of suitable certificates and $100 in cash, the cash prize being divided in case of joint authorship. These prizes will be presented to the winners on June 23 at the Summer Convention. The members of the Committee who acted upon these awards were Messrs. A. E. Knowlton, Chairman, H. P. Charlesworth, and W. S. Gorsuch. The substance of the Committee´s report is as follows :