3Q2 T. C. CHAMBERLIN 



the flat sides or outer border of the stellar discoid where these 

 conditions of low orbital velocity and momenta and prevalent 

 sub-parallelism are dominant, and thus the distribution of nebulae 

 and the doctrine of close approach seem to be, so far at least, 

 brought into harmony. 



It may be needless to remark that the general conception 

 lying back of the doctrine of dispersion by close approach has 

 a complementary regenerative or reconstructive phase, which, 

 taken with the dispersive phase, makes up a cyclic process. With 

 the disruptive action there is correlated a reciprocal concentrative 

 action, which is supposed to reproduce organized systems out of 

 the wreckage of disrupted systems. The notion is further enter- 

 tained that the two processes may be mutually self-adjustable, 

 within the limits of general conditions, and thus may give a 

 large degree of perpetuity to the existing phase of the stellar 

 system. 



T. C. Chamberlin. 



University of Chicago, 

 June 1901. 



