In the earlier tests 16 parts of starch converted by 1 part of the ferment was the value found. These results are in close agreement with values reported by Sherman (_Jour. Am. Chem. Soc._, xxxii, 1073) for a sample of recent purchase. He found a conversion of 51 parts of starch to the colorless end-point in _thirty_ minutes for one sample, while for another he found 66 parts, in the same time. It will be noted that our time limit is _ten_ minutes. It is worthy of note that for a perfectly fresh and specially prepared sample furnished by Dr. Takamine, a conversion of 278 parts in _thirty_ minutes was found by Sherman. Taking the time into consideration, it will be seen that the results are about the same for the market samples as those found by us and much lower than claimed, as well as much lower than for other makes of similar products. The difference in the behavior of fresh specially prepared Taka-Diastase and the market sample is very clearly shown. No one questions the fact that fresh laboratory samples of Taka-Diastase may show a moderate converting power on starch. But we have to deal with the _activity of market samples only_, and Sherman’s work and our own show the low digesting power of the product as physicians may secure it on the market. The marked difference in activity between perfectly fresh and ordinary market samples of Taka-Diastase is very clearly shown also in a recent paper published by Wohlgemuth.[24] In the digestion of starch paste to the “dextrin” stage Wohlgemuth found in the commercial sample a strength approximately a hundred times less than that observed in a fresh sample sent him by Dr. Takamine. [24] Wohlgemuth: Biochem. Ztschr., March 18, 1912. Wohlgemuth’s results were obtained by a method not essentially different from ours, with this difference, however, that he digested through 24 hours in the cases reported, and carried the reaction to the “dextrin” stage only, in place of to a colorless end-point. Making the proper reductions, it is evident that the actual values found by him for the market samples bought in Germany are not greater than those reported by us.