HOGGAN'S OBSERVATIONS OF THE TRANSIT. 



399 



For Lieut. Hoggan's observations we have, therefore, the following results, 

 assuming the Latitude 19. 44'. 47" S., Longitude 4 h . 13 m . 46 s . Bast of 

 Greenwich : 



The mean of the times recorded for " Ligament decreasing in width " and 

 " It had faded away " at Ingress gives the following equation for distance of 

 centers, taking E = 976"-80, r = 31"'42, and the mean solar parallax = 



8"-950 (l + ) :- 



+ 7 "-8o = +o"-ig36 n +-6096 B R.A. 7504 8 N.P.D. o"-o3o3 5 t S R + 8 r. 



Similarly, the mean of the two times for Internal Contact at Egress, taking 

 R = 976"'82, r and n as before, gives 



+ 3"'94 = -o"'027i n --2179 8 K.A. --9717 8 N.P.D. +o"-o332 fc t - 8 R + r. 



G. L. T. 



3 F 



