654 Lieutenant Eenny on the Constants of 



Bessel's General Formula. 

 (^-^)=<7|l+fcos20| jl+A;'!^[^^_ 8' >log§±(H.C.),Cent. 



VBB'j 



X- A- 



z-(x-A) + -. 



r r 



Kenny's General Formula, having Constant and Coefficients in Figures, 

 z = 18404-9 metres \ 1 + 0002695 cos 2^1 jl + "^ihlli ji + o-003665'^j x 



xlog|^g±(H. O.Cent. 



1+^—^" X 



r I 

 X jl + 0-00203611 (^-y^-Ss]! log |^g± (H. C), Fahr. 



Bessel's General Formula, having Constant and Coefficients in Figures. 



Metres. j. ' 1 '' ^ 



{^-^) = 18404-8 11 + 0-002695 COS 2^) I jl + 0-003665 ^^^ \ c' \ 



^ ^ t -/BB'j 



xlog|±(H.C.). 



z-(x-A)^ . 



r r 



Kenny's Correct Formula, adapted to the Latitude of Dublin = 53° 23' N. 



Metres. / 9^4,^1 l A- '\ Ji " 



^= 18390-5 1 +— ^— 1 + 0-003665 ^ log J— ^ ± (H. C,)- Cent. 

 r = 60337-5 jl +^j jl + 0-002036111 (^'-32)j log |^±(H.C.),Fahr. 



