Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
April 1, 1928
A good rate of growth was observed on the test plant.
March 25, 1928
The test plant showed no sign of improvement.
January 22, 1923
No visible effect was noted in either the control or treated plants.