Usage History of 'olfactometers'

The following chart shows how frequently 'olfactometers' appeared in printed materials over time. For example, the word 'olfactometers' occurred 12 times in books in 1892 and 46 times in 2008. From 1892 to 2008, the word 'olfactometers' was used a total of 3,840 times in books scanned by Google. See Reference: Google Ngram project.

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