G0'(0) - 1.128379, Gi(G) = 0.354998, G2'(0) - -0.262704(7) Thus, G'(0) - 1.128379 + 0.354998e - 0.262704e 2 (8) Another result of importance is the drag-coefficient Cf which is given by (Ref. 1) CAN) = (9) [2N(N+\)Y/(N+1) In Table 1 we compare the results given by present analysis with those of Ref. 1 and Wells.3 It may be observed that the perturbation results are almost exact in the region 0.5 ^ N ^ 1.5.