This report by Dr. Mosenthal1 contains a point which is not brought . out in the description. If the table which gives the quantitative urinary analysis be examined, it will be found that, on those days in which protein and fat were given to the diabetic individual and carbohydrates rigidly excluded, the D:N ratios were respectively 3.75, 3.85 and 3.44. Thus on May 19, with a total excretion of 27.7 gm. of nitrogen, the D:N ratio was 3.75, and on May 24, with a total excretion of nitrogen of 11.8 gm., the D:N ratio was 3.85. It is also noticeable that the ammonia excretion remains comparatively low on these days, 2.9 gm. on one day and .9 gm. on the other day.
These conditions are very like those in the case reported by Mandel and Lusk.2 At the time of their investigation, they termed the ratio 3.65 the fatal