File:American journal of physiology (1898) (14596565438).jpg

Identifier: americanjourna04ameruoft (find matches)
Title: American journal of physiology
Year: 1898 (1890s)
Authors: American Physiological Society (1887- ) American Physiological Society (1887- ). Abstracts of papers presented at the fall meeting American Physiological Society (1887- ). Proceedings
Subjects: Physiology Physiology
Publisher: (Bethesda, Md., etc.) American Physiological Society (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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de, afterheating the urine with HCl to decompose etherial sulphates, andP2O0 by titration with uranium acetate. The determinations wereusually made in duplicate, and the results still further controlled bypreparing and analyzing a composite sample representing the urineof the entire day. Heat of combustion of urine was determined byevaporating on filter blocks at 60° and burning in the bomb calori-meter in the usual manner. General Results. The detailed data determined for the urine of each subject duringeach period are shown in Table A, page 32. The excretion of nitrogen and SO3 are graphically represented inFig. r, in which the actual weights of the constituents excreted perhour are shown on the ordinates, while the abscissae mark periods oftmic. The curves representing the excretion of nitrogen and SO, aredrawn respectiv^ely in solid and broken lines. ^ See Bui. 69, Office of Experiment Stations, U. S. Department of Ac:riculture. Elimination of Nitrogen, Sulphates, and Phosphates.
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Fig. I. The curves here shown represent the actual excretion of nitrogen and SO3 foreach subject. The rate of excretion in grams per hour is shown at the left, while thedays are shown at the top of the figure. The excretion of nitrogen is representedby solid, and that of SO3 by broken lines. Where the individual curves show any ap-preciable divergence they are marked with the initials of the subjects (H. and S.) theperpendicular lines, marking the beginnings of the 20th and 22d, show the points atwhich the extra protein was consumed. The peculiar form of the nitrogen curve forthe first day of the experiment may perhaps be due to the change in routine. A comparison of the excretions of the two subjects as showneither in the tables or in the curve reveals a very satisfactory agree-ment throughout. For convenience of discussion, therefore, we haveaveraged the results, thus permitting the excretion of each constit-uent to be summarized in a single compact table. Tables B and Cshow respectamericanjourna04ameruoft

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