Preliminary Note on a New Element in Thorianite

While working on thorianite in University college, London, under Sir WILLIAM RAMSAY'S direction a few years ago, an element believed to be new was met with in the iron group in the usual course of analysis, but, owing to the small quantity, its nature could not be fully established. The subject has been resumed since my return to Japan, and it has fortunately been found that the same element also occurs in other minerals, such as reinite and molybdenite, both found in this country. This somewhat incomplete paper is now published as a preliminary notice of the work, which is still going on.