[in Japanese]

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[in Japanese]

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In this report, it is proposed to describe briefly the geographical distribution, occurence, properties, and chemical compositions of diatomaceous earths found in foreign countries, as in Germany, United Kingdom, France, Italy, Russia, Demmark, Austria, Algelia (Africa), Australia, Canada and Eastern countries.
The deposits are widely distributed all over Europe. Especiallv, the chief deposits located near Lüneburg Heath, in the province of Hannover in Germany, are the largest so far discovered in Europe and is reported that about eighty percentages of the entire out of diatomaceous earths in Germany are supplied from this vicinity. These beds are stratified into three zones, a white, a grey, and brownish green whose varying colours depend upon increasing percentage of organic matters, and the greenish layer is fouud mostly in the lowest place of the bed, usually is slaty and almost impervious to water. These facts are extremely resembled to the occurence found in our actual survey on deposits in Japan and the reason of existing of the greenish layer are already described in our previous peper.
A Iarge and excellent deposits of diatomaceous earth occur in United States of America, especially
in California. A most impressive deposit of diatomite is located near the city of Lompoc and near the confluence of Hat Creek and Pit River. It is reported that the beds of the former are 700 feet thick and cover an area of six square miles showing more than a hundred million tons are avairable to a supply adequate for generations.
In the United States, other many great deposits of diatomaceous earth are found not only in California but also in the other different states, namely in Nevada, New Hampshire, Oregon, Washington, Connecticut, Maryland, New York Virginia, Richimond and Florida.
Diatomite deposits are found almost all over Canada. The largest deposits are those in the districts of Quesnel, British Columbia and are reported as being up to 60 feet in thikness.
Distribution of deatomite deposits in other countries and their chemical compositions are also described in this paper.

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