A text-book of physiology for medical students and physicians / by William H. Howell.

  • William Henry Howell
Date:
1913
Catalogue details

Licence: Public Domain Mark

Credit: A text-book of physiology for medical students and physicians / by William H. Howell. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    PREFACE TO THE FIFTH EDITION. In preparing this edition the author has attempted, as in former editions, to keep the book abreast of current investiga- tions in physiology. Since the pubhcation of the fourth edition important changes have occurred in physiological views, particu- larly in regard to the difficult subject of metabolism. The active work going on in physiology and physiological chemistry has added greatly to our knowledge of the details of intermediary metabolism in the body, and in some respects has brought into question what before were considered established theories or principles in regard to the processes of nutrition. The indication, for example, that the animal body, under certain conditions, may obtain some of its necessary nitrogen for the synthesis of protein from inorganic sources would have seemed almost impossible a few years ago. In the same line, the valuable work that is accumulating in relation to the specific functions of the different proteins in growth and in maintenance opens a field of investigation that bids fair to be of fundamental importance in dietetics. In an actively growing science changes of this character are, of course, occurring con- stantly. Arising usually among some limited group of workers, they soon, when significant, permeate the whole subject. A text- book must attempt the difficult and somewhat hazardous task of recognizing the point when such views have matured sufficiently
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