142 THEORY OF HEAT. [CHAP. III. 



final values of the unknowns a, b, c, d, e, f, &c., the following 

 expressions : 



. 



_ _ _ ___ 



6.8 4.10 2.12 2.16 4.18 



1.1 3.3 5.5 7.7 11.11 13.13 

 f 8 . 10 6 . 12 4 . 14 2 . 16 2 . 20 * 4 . 22 



1.1 3.3 5.5 7.7 9.9 1313 15.15 



10 . 12 8 . 14 6 . 16 4 . 18 2 . 20 2 . 24 * 4 . 26 



The quantity ^TT or a quarter of the circumference is equiva 

 lent, according to Wallis Theorem, to 



2.2 4.4 6.6 8.8 10.10 12.12 14.14 

 1 . 3 3 . 5 577 77 9 ~97TT 11713 137T5 



