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From J. S. Burdon Sanderson   25 April 1874

Summary

Purpose of experiments was to determine digestive activity of liquids containing pepsin. Gives required amounts of hydrochloric, propionic, butyric and valerianic acids. Describes experiment and gives results. Also experimented on digestive activity of butyric acid at greater temperatures than the termperature of the body.

Author:  John Scott Burdon Sanderson, 1st baronet
Addressee:  Charles Robert Darwin
Date:  25 Apr 1874
Classmark:  DAR 58.2: 65–70
Letter no:  DCP-LETT-9427F