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There is nothing in this booklet to recommend it unless it is the illustrated breathing exercises to increase the girth of the chest. It is rambling and unscientific, with recourse to selected quotations from "authorities." It is an example of the type of writing which, fortunately, is getting rare in medicine.
Heart Disease and Tuberculosis: Efforts Including Methods of Diaphragmatic and Costal Respiration to Lessen Their Prevalence. JAMA. 1936;107(19):1587. doi:10.1001/jama.1936.02770450071036