Manual of physical diagnosis : for the use of students and physicians / by James Tyson.

  • James Tyson
Date:
1900, c. 1898
Catalogue details

Licence: Public Domain Mark

Credit: Manual of physical diagnosis : for the use of students and physicians / by James Tyson. 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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    lated white of egg is cut into thin slices, and out of these small discs are cut by a cork-borer or similar in- strument. These may be prepared in quantity and kept for use in glycerin, which should, however, be washed off before using the slices. An equal quantity of the filtered gastric fluid is placed in four small test-tubes and one or two discs of albumin put into each. To the first nothing else is added, to the second enough hydro- chloric acid to make a solution of about * 0.3 to 0.5 per cent. This is accomplished by adding two drops of hydrochloric acid to five c. c. (90 minims) of stomach contents. To the third is added a definite quantity of pepsin, about 0.2 to 0.5 gram [gr. iij to gr. viiss], to the fourth both hydrochloric acid and pepsin. The test-tubes are placed in an incubator at about 100° Fahr., and from time to time examined with a view to learning how far the liquefaction of the discs of albumin has proceeded. The rate of this will inform us whether digestion would have occurred without the addition of anything, or whether acid or pepsin or both were necessary. We will learn, also, whether by adding more hydrochloric acid we have made the acidity excessive. It must be remembered, however, that after the pep- tone has reached a certain percentage, its further pro- * The difference between the strength of the acetic acid of the German Pharmacopoeia (25 per cent, of the anhydrous acid), in- tended by Evvald, and that of the U. S. P. (32 per cent.) is not sufficient to necessitate a change of proportion.