[ t4r ] 
Then m:1::3/@+9:1@. And m:I3;:@+9:9. Therefore 
m—I3:13::9:@. And therefore 2: m—I?::©:9. QO, E. I. from 
whence the denfity is eafily deduced. However I freely allow 
all the difficulties of reducing this to practice. 
N. B. If we take the law of the denfities laid down by Mr. 
de la Lande, viz. as the roots of mean. motion, the denfity of 
Saturn inftead of ,10448, which is his number, will come out 
518351, much nearer to Newton’s, which reduced to this fecale 
would be ,16750. But Newton’s quantities of matter were 
neceflarily defective from applying the folar parallax 10',5 
inftead of 8°,6. 
