W. A. Norton—Molecular and Cosmical Physics. 339 
1. There are two alternations in the nature of the effective 
molecular action, viz., one from a repulsion at the most minute 
4. 
distances to an attraction at greater distances, and another to 
a repulsion beginning at the outer limit of the attraction, a0 
ve . . . in t e 
2. For some distance above and below a the curve is very 
nearly a right line, showing that the effective actions are for 
Pp 1 to the distance 
from the point of rest. ‘Tt is to be observed that r, the thick- 
and hence that any displacement a? is a much smaller fraction 
of the distance between the centers of the molecules than of 
the distance Oa between the envelopes. . 
3. The calculations were made for various values of os 
from 4-938 to 12-410. The former value gives a curve lying 
entirely below the axis of x, and touching it at the distance 
