Strongylocoris Blanchard: Six New Species from North America (Hemiptera, Miridae). harry H. Knight pages 1-8

The Formation of Vitamins A,B1, and C In Lemna grown in the Absence of Organic Matter. Norman A. Clark, B.H. Thomas, and E.E. Frahm pages 9-16

A Method for recording Evaporation from a porous Atomometer Cup. L.A. Richards and M.B. Russell pages 17-20

The High Frequency Glow Dishcarge in Hydrogen Excited Through internal Electrodes. G.W. Fox and N.T. Burdine pags 21-26

Lower Cost Diets for Hatchery trout. W.W. Aiken pages 27-34

Abstracts of Doctoral Theses. pages 35-106