Note 188 — Chapter V

Revue scientifique, 1892, 1st half-year, p. 145. It is also from hygienic considerations in regard to the mouth that many peoples of India and the Negroes of Senegal chew continually the dried roots of different plants reputed antiseptic. In Siberia and in the east of Russia the chewing of pine resin (“séra”) has probably the same origin. The habit of chewing tobacco is only common among European sailors and among the Javanese and Chukchi.