19 B Mr, maseres's Method of 
Third, differences. 
■ 05 °, 793*650,793; 
.013,852,813,853; 
.005,328,005,328; 
.002,486,402,487 ; 
Be c. 
Fourth differences. 
•036,940,836,940; 
.008,524,808,525; 
.002.841,602,841 ; 
Sec. 
Fifth differences. 
.028,416,028,41 5 ; 
.005,683,205,684; 
Sec. 
Sixth differences. 
.022,732,822,731; 
8cc. 
Therefore d 1 is = .133*333,333,333; 
D 11 = .076,190,476,190; 
D UI =-050,793,650,793; 
D IV =.036,940,836,940; 
D v = .028,416,028,415; 
D vt = .022,732,822,731. 
Therefore the feries i~—+~ 
3 S 
equal to the feries 
A * 5 X 6 X 1 
if IS 15 
+ 8cc. is 
1 •333*333,333*333, * I+ * 
A- AT 
33>333?333>333> x 
— .076,1 90,476,1 90, x 
- -050,793*650,793, X 
- .036, 
