388 



T. C. CHAM BERLIN 



In case the collision of two suns becomes essentially central, 

 a general dispersion of the most violent sort may be inferred to 

 follow, and this may find exemplification in the vast irregular 

 nebulas, which are in many cases more or less radiant, and in 

 some cases consist of two irregular masses which perhaps repre- 



FlG. 2. — Diagram illustrating the progressive elongation and rotation of two suns, 

 C and D, approaching perihelion. The position C corresponds to D^, C^ to D'-, etc.; 

 the lines joining these indicate the successive directions of mutual gravitation, and the 

 arrows indicate direction of movement. The progressive elongation, the lag, and the 

 rotation of the bodies at successive stages are diagrammatically indicated. 



sent the wrecked originals. The collision of dead suns in which 

 disruption shortly preceded actual impact may also play a part 

 in forming irregular nebulae. 



Speculation may perhaps go so far as to attribute ring nebulae 



