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1 From the Pharmacological Laboratory, Johns Hopkins University
1. The effects of a number of odoriferous substances were studied on the behavior of rats in the circular maze.
2. It was found that valerian and asafetida exert a distinctly sedative effect when studied in this way.
3. The inhalation of fumes of various samples of incense was not found to produce any depressant effect unless the fumes were so heavy as to render intoxication with poisonous gases probable.
Submitted on June 14, 1921