EnvironmentJuly 1, 1928
Can We Grow Our Own Rubber?
Guayule, a Native American Rubber-producing Shrub, Is Being Cultivated on a Large Scale in California.
Stories by D. T. MacDougal
HealthJuly 1, 1927
Sunburn in the Dark
Treatment With Isolated Ultra-Violet Rays from the Sun
EnvironmentJune 1, 1926
The Hydrostatic System of Trees
The Force that Draws Tons of Sap to the Topmost Branches of Trees Is the Evaporation of Water from the Leaves
The SciencesNovember 11, 1911
Hugo de Vries
Famous for his Mutation Theory of Descent
The SciencesFebruary 25, 1911
Environment and Heredity
Modern Studies in Experimental Evolution
The SciencesMarch 23, 1907
Hybridization of the Oaks