One of us (R. B. G.), in November last, reviewed the chemical findings in a case from our diabetic clinic before the Iowa Clinical Medical Society. Interest in the case centered in the fact that a final diagnosis of what was otherwise a case of pronounced renal diabetes could not be made because the sugar curve indicated a deficient glycogenesis of the mildly diabetic type. A study of the effects of a repeated ingestion of glucose on the sugar curve by Hamman and Hirschman1 was recalled, and we predicted in our report that a decisive differentiation might be obtained if we employed the double sugar curve test in this case. The patient was requested to return for further observation, and promised to come to the clinic in January of this year.
We have in the clinic, at the present time, a second patient with a fasting hypoglycemia and a