

{I; - :, 



. s ,^s^^|ffl|^fe&y Av<:: . 



.?>*• -"»;« V- '-v..y. --t.-... -» <aii^v.. ■...■■" '.i ..7. 7-.- .•v.-.'- .,!.••.• ,<v>>,- ;:..-.•*:• 



FIGURE NO. 2 



NEBULAE 



The lower figure gives a diagrammatic indication 

 of Laplace's nebular hypothesis. The center of the 

 rotating nebular mass forms the sun. Successive rings 

 are separated off, each concentrating into a planet. 



The upper figure gives a diagrammatic indication of 

 a two-armed spiral nebula. 



