68 Trans. Acad. Sci. of St. Louis. 



ous distribution here used as a basis of comparison, the den- 

 sity of the gas at the center is infinite, and still the average 

 density of the sun could not exceed 1.296 under conditions of 

 stability, if it were wholly gaseous, and the pressure of 

 366,000,000 atmospheres were superposed upon it, the temper- 

 ature being 20,000,000 degrees at least. Of course, if the 

 sun has a liquid core, it must be composed of substanc e 

 whose critical temperatures are above that of the sun. 



The low temperature of the sun seems to be almost wholly 

 compensated, by the obliteration of cosmical or interplane- 

 tary pressure. 



Issued May 1,1899. 



