Figure 13. Humidity stimulation based on the dry-bulb principle.

Impulse frequency of the dry cell of Fig. 7B as function of the dry-bulb temperature (atmospheric temperature) during oscillating changes in the wet-bulb temperature at different temperatures levels. Relationship approximated by linear regression [f = yo+aT]. Resolving power of impulse frequency for dry-bulb temperature (the number of discrete steps which impulse frequency can distinguish within the temperature range). The band encloses all responses throughout the range and enables 4 steps to be distinguished. R², coefficient of determination; the number of points was 30. F impulse frequency.