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Studies are presented on the effects of body and tobacco smoke odors on men who are confined. Ventilation requirements for the removal of these odors from enclosed structures are indicated. The number of persons (smokers and non-smokers) occupying a shelter and the fresh air supply are two important factors affecting the quality of the air. The outdoor air temperature, the humidity and the number of occupants influence the amount of fresh air supply needed to maintainA COMFORTABLE ATMOSPHERE IN THE SHELTER. Methods found to be effective in reducing the concentration of body odors and tobacco smoke in closed rooms are: fresh outdoor air supplied through a simple ventilation system, recirculation of indoor air through charcoal filters or through a spray- type dehumidifier, use of deodorants, and an increase in the temperature and humidity of a room.

Sixteen receptive females were first observed during a 10-min habituation period that consisted of presenting them with two empty cardboard tubes housing the odors from the same male. After the habituation period one tube was removed and replaced with a tube housing the odors from a novel male. During the second 10-min testing period, the females spent a significantly greater amount of time with the novel males’ odor, after both 5 min (p .01) of testing. The females’ response to the novel males’ odor indicated that female rats can use olfactory cues to discriminate between individual male rats.