Collected papers on physical and military training / by Sir Lauder Brunton.
- Brunton, Thomas Lauder, Sir, 1844-1916.
- Date:
- 1915
Licence: In copyright
Credit: Collected papers on physical and military training / by Sir Lauder Brunton. Source: Wellcome Collection.
Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.
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![shown that this occurs by taking a photograph with the Eontgeu rays before and after exercise. Such dilatation usually causes pain and a feeling of constriction over the cardiac region, and Fig. 22. Fig. 23. Fig. 22.—Heart fully distended, showing insufficiency of the valves to close the mitral and tricuspid orifices (seen from the back and the auricles removed, so ae to display tlie auriculo-ventricular orifices). Fig. 23.—Heart in full systole, showing the mitral and tricuspid orifices so diminished by the muscular contraction that the valves close them easily (seen as in Fig. 22). Fig. 24.—The same heart as in Fig. 23, seen from above. the enfeebled circulation may lead to a sudden synco])e. These are the conditions to which over-exertion is most likely to give rise in boys at school who go in for long paper chases, in which a great strain is made both on the strength and endurance of the](https://iiif.wellcomecollection.org/image/b21358497_0040.jp2/full/800%2C/0/default.jpg)
