A critical and experimental essay on the circulation of the blood : especially as observed in the minute and capillary vessels of the batrachia and of fishes / by Marshall Hall.

  • Hall, Marshall, 1790-1857.
Date:
1831
Catalogue details

Licence: Public Domain Mark

Credit: A critical and experimental essay on the circulation of the blood : especially as observed in the minute and capillary vessels of the batrachia and of fishes / by Marshall Hall. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    ^ INTRODUCTION OF THE PRINCIPLES OF INVESTIGATION IN PHYSIOLOGY. The sources of our knowledge in physiology, as in all natural science, are observation and experi- ment : the former consists in a sustained and watchful attention to events which pass under our eye in the ordinary course of nature ; the latter, in devices for placing natural objects in new and unusual circumstances or situations. Unhappily for the physiologist, the subjects of the principal department of his science, that of animal physiology, are sentient beings; and every experiment, every new or unusual situation of such a being, is necessarily attended by pain or suffering of a bodily or mental kind. Inves- tigations in this science should, therefore, being B