FOOTNOTES:
[3] A knowledge of the mucous lining of the stomach and intestines, and of the tributary glands, such as the liver and pancreas, is important to a thorough understanding of digestion, and the reader is referred to “The Vital Organs: Their Use and Abuse” of this series. This takes up the study of the secretion of digestive juices, the conditions favoring normal secretions, etc.
[4] See “The Vital Organs; Their Use and Abuse” by Susanna Cocroft.
[5] For illustration see the frontispiece of “The Circulation, Lungs, Heart,” of this series.