Question: Wood is opaque to light but is easily penetrated by X rays. The latter, however, are stopped by some kinds of clear glass. Does this not show that light and X rays are of different nature?
Is it desirable to study the theory of evolution in connection with a high school course in Botany? If so, to what extent?
What is the purpose of crop rotation?
©1931 by Iowa State Teachers College
Kadesch, W. H.; Clark, O. R.; and Scott, Winfield
Science Bulletin: Vol. 3:
5, Article 9.
Available at: https://scholarworks.uni.edu/science_bulletin/vol3/iss5/9