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I picked up a copy of this book at a book sale held by Suva's Carnegie Library in 1971 or 1972. It was not in good condition, but it was 'all there'. One useful aspect was that the book's 'hard' cover was flexible, much like the USN's "Blue Jacket Manual".
Vulcanologists, thanks to all the research reported in this book, knew a century ago that volcanic eruptions can cause cooling, and do help with plant fertility—that although they do many harmful things, they are a vital contributor to life on this planet.
The book was so thorough and so well illustrated—charts and maps as well as photos—that it helped secure my love of the National Geographic for another 25 years. At some point in the last decade, the book slipped out of our collection. I would love to yet have it. Despite its antique, static and grayscale presentation, it did not have the unnecessary hoopla that one finds in most NGS publications today. .