700 



Prof. P. Lowell on the Limits of the 



In this manner we get for homogeneity the following 

 table:- 





2- 



V- 



f. 



P 

 in terms 

 of water. 



T 



in hours. 



Earth 



•00230 

 •00306 

 •05686 

 •10177 



1 

 231-7 



1 

 174 



1 

 9-13 



1 

 497 



1 



289-6 



1 

 217-5 



1 

 11-4 



1 

 623 



5-527 

 3-924 

 1-322 



0685 * 



23-933 

 24-623 j 

 9 842 

 10-22 



Mars 



Jupiter 



Saturn 





* Deduced from the mean of H. Struve's two determinations of the diameter 



1894, 17"'52 at dist. 9-539 and of his oblateness ±= . 



9 5 



using the latest determinations of the rotation spins at their 

 equators, and of their several mean densities. The decimals 

 of the second and third places in the values of p are given 

 merely for the computation. 



13. Comparing with these values of 77 the actual observed 

 oblateness rji of the same planets, which are 



Vi 



Earth 2k 



Mara T9-0 



Jupiter m 



Saturn — — 



9*5 



we see that none of these planets are homogeneous, but that 

 the inner and smaller come nearer to it than the larger and 

 outer ones. 



14. Turning now to the other limit for the law of density, 

 to wit when its rate of change is infinitely great from surface 

 to centre, we note in the first place that this condition corre- 

 sponds to where all the matter composing the body is con- 

 centrated at the centre. There is in this case a kernel of 



