GRAVISTATIC HEAT 69 



of its ancient citizenship in the solar monarchy. If, 

 on the other hand, it did not rush in rudely, but de- 

 corously detached itself from a former allegiance and 

 gently joined itself to the sun's, it must be older still, 

 since there have been many later comers than it. In 

 either of these ways it may have immigrated, but if so it 

 has been naturalized so long as altogether to have lost 

 its foreign accent and behavior. 



