Science: Shy Volcano

Most volcanoes, loud and pushing, build their cinder cones openly of fiery ash and lava. But a few volcanoes work under cover. Their molten lava never reaches the surface, but quietly pushes up the earth's rock layers as water from a burst pipe raises a blister in an asphalt pavement. Last week scientists were studying a report by Professor Hidezo Tanakadate, geographer at Tokyo's Hosei University, on the only undercover volcano whose birth and growth have been observed by scientific men.

Late in 1943, Masao Mimatsu, postmaster and amateur volcanologist of Sobetsu, a small town in southwestern Hokkaido, was working on...

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