298 



TRANSIT OF VENUS, 1874. EGYPT. 



The Equations are then formed in the manner described in the Honolulu 

 section, page 47, adopting the same notation and taking the tabular semidia- 

 meter of the Sun 16'. 16"'82. The mean of the 23 measures on the negative 

 side had been considered equal in weight to the mean of the 14 measures on 

 the positive side, by which the zero is eliminated. 



For the Telescopic Contact at Egress, assuming the Latitude 30. 1'. 46" '4 N., 

 Longitude 2 h . 5 m . 6 s -58 East of Greenwich, we have : 



