Note 36 — Chapter XVIII

Since writing the above, I have seen two springs of pure cold water on the summit of the dormant volcano of Fuji Yama, in Japan, at an altitude of about 13,000 feet; also those in Haleakala, the great extinct volcano in the Sandwich Isles—altitude 10,000 feet—whence it would appear to be the nature of extinct volcanoes to produce such springs.