[FORM No. 19.] 



SPECIMEN OF FORMS, Nos. 18 AND 19. 



[PAGE 



(11) 



BRITISH EXPEDITION FOR OBSERVATION OF THE TRANSIT OF 



VENUS, 1874. 



CALCULATION OF TABULAR PARALLAXES IN R.A. AND N.P.D. BY NORMAL-CENTRIC METHOD. 



Station . Latitude N.S. 



Log. Axial Dist. of Normal Center , 



. Log. Normal-centric Radius , 

 Tab. hor. eq. parallax, for Q > , for 



NOTE. Time is to be taken to the nearest 1'. 



R.A. in arc, hour-angle, P.D., o, 0, y, to the nearest 10". 

 Logarithms to five decimals. 

 Parallaxes to 0" -01. 



Computer's signature. 



3y 2 



