ON THE CALCULATION OF MATHEMATICAL TABLES. 67 



C(2r)2 P, 



=al i-9572505 



C(4r)2=al 0-0914429 



C(40)=C(4r)=alO-0457214=M110187 



C(80)2=X-V.^?i 

 C(20)2 ^ Pi 



=al i -870751 5 



0(80)2= al 0-00496439 



C(80)=al 0-0024719= 1-005708 



As a check on the A values, the product 



A(20) A(40) A(80)=(^sin^38)^(--!^27^^=(^)^(-^)^'^ 



Where a;=8-05070502 , . . , 



a;3_27=l-3923048454=al 0-3305999 ; 

 and thus 



A(20) A(40) A(80)=al 1-3306001, 

 in agreement with the calculations above. 



