TABLE 1.

Surface tensions of culture filtrates of B. subtilis C-1 grown at different temperatures^a

Dilution	Surface tension (dynes/cm) of the cell-free broth at a growth temp of:
	25°C	30°C	45°C
None	29.4	29.0	30.4
10-fold	34.0	33.1	37.7
100-fold	43.2	44.2	51.5

^aB. subtilis C-1 was grown in minimal medium for 48 h. The surface tension of this medium was 71 dynes/cm.