According to the above analytical results it will be noted that: (1) The dry matter, ash, protein, starch, dextrin and nitrogen-free extract content of the “sotetsu”-seed reaches its maximum distinctly at a definite point of the ripening period and decreases later. (2) The sugar content of the “sotetsu”-seed increases gradually in the ripening period, on the other hand the content of fibre and non-protein nitrogen decreases gradually. (3) In the ripening period of “sotetsu”-seed, the content of crude fat decreases gradually and increases later; but the crude protein comes up to its maximum and decreases later. (4) The sample picked up on Aug. 30 is remarkably unriped seed, and the water content of the material is very large; then the reducing sugar, ash and non-protein nitrogen content in dried state is considerably high than that of other ripening date. (5) From the above data, the weights of ripening endosperms and its compositions, the reasonable picking time of the “sotetsu”-seed for the raw material of starch manufacture seems to be the last decade of october to november at Kagoshima; but according to the climate even in the same district it may be more or less different.
Albino rats failed to secure satisfactory growth on diets containing a high percentage of any of the fats used except butter. The addition of yeast to the diet did not improve the growth of the animals. With the supple-mentary feeding of linoleic acid in addition to yeast the animals attained nearly the normal rate of growth, demonstrating anew the importance of linoleic acid as a dietary element.
1. When rats were fed on sperm head oil as well as on arctic sperm oil (oils of skin, muscle and bone), adding 10_??_15% in the diet, an oily substance diffused out from the skin and the animals show such an appearance as if they were dipped in oil. Besides, the above oils are very noxious, retarding the growth and finally causing the death of animals in a few weeks. 2. The above symptom produced by the whale oil cannot be prevented by adding 15% yeast in the diet, though the toxicity seems to be somewhat reduced, but rather the addition of yeast favor the development of more conspicuous symptom. 3. Saponification products of whale oil, namely, fatty acids and unsapo-nifiable matter, produced no such symptom as the original oils, but the toxicity was stronger than the latter. Moreover, it is not decided whether or not the substance which causes seborrhea is identical with that which prevents the growth of the animal. 4. The severe symptom appeared on these animals which grew relatively well with good food intake. 5. The oleic acid ester of oleyl alcohol synthetically prepared by the author exerted the same effect as whale oil, but oleyl palmitate or cetyl oleate gave no such phenomena. In conclusion, the author wishes to express his sincere thanks to Prof. U. Suzuki for his kind guidance. Thanks are also due to the Tokai Fishery Company and to Mr. K. Tashima for their kindness in supplying the materials.