Abstract
In a previous paper 1 we discussed the renal functional test meal, the interpretation of renal function as judged by specific gravity variation of the two hour specimens and character of night urine, and offered clinical evidence purporting to illustrate the influence of several extrarenal factors 2 on the test meal reaction. These extrarenal factors interfere considerably with the uniformity of response to the test meal by the same individual, at least upon viewing the responses in the manner heretofore suggested by Mosenthal. Subsequent to the publication of our study, Mosenthal 3 reported further studies in renal response to diets in which he felt obliged to revise his previous dicta as to evidences of normality and the significance of certain deviations therefrom, although still adhering to volume and specific gravity as the essential criteria of renal function. The nature and direction of his revision can be gleaned from an inspection of Table 1,
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