Usage History of 'actinometric'

The following chart shows how frequently 'actinometric' appeared in printed materials over time. For example, the word 'actinometric' occurred 26 times in books in 1842 and 70 times in 2008. From 1842 to 2008, the word 'actinometric' was used a total of 10,737 times in books scanned by Google. See Reference: Google Ngram project.

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