12 



Trans. Acad. Sci. of St. Louis. 



\ 







S 



$ 



a' 



st-^> 



<M 



*J2 X 



Explanation. — At.m., Assumed theoretic upper limit of atmosphere; 

 Phot., Photosphere; C.T.K. = If, Arbitrary Curve of temperature for k = 

 If; C.T.K. = 1-4, Arbitrary Curve of temperature for k— 1-4; C.D.K. = 14, 

 Absolute Curve of density for £=1*4; C.D.K. = If, Absolute density for 

 *=1|. 



