Usage History of 'hypsometers'

The following chart shows how frequently 'hypsometers' appeared in printed materials over time. For example, the word 'hypsometers' occurred 2 times in books in 1868 and 16 times in 2008. From 1868 to 2008, the word 'hypsometers' was used a total of 2,352 times in books scanned by Google. See Reference: Google Ngram project.

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