(1) The vertical variations of chlorinity, temperature, the oxygen content and the hydrogen ion concentration in the region of the “Kurosio” (the Japan-Current) were investigated. (2) From the result above, the vertical structure of the “Kurosio” was discussed. In conclusion, the author wishes to express his hearty thanks to Professor T. Okada, Director of the Central Meteorological Observatory of Japan, for his kind guidance and the permission of publishing this report. He is also indebted to Mr. H. Matui for the assistance of the work.
Dehydroergopinacone diacetate was prepared and its absorption spectrum in ultraviolet region was studied. Ergopinacone diacetate was shown not to be dehydrogenated with mercuric acetate. From the results a probable constitution (VII) was assigned to dehydroergopinacone, following Inhoffen’s ergopinacone formula.
7-Dehydrocholestene was exposed to sunlight with eosin in alcohol–benzene solution in the absence of oxygen. A product analogous to ergopinacone from ergosterol was obtained. Thus it was demonstrated that the carbon atom 3 or any group attached there does not take part in the photochemical dehydrogenation of ergosterol and its analogues.