TRAN SIT 
OF 
1874. 
Drawn by. R.A.Proctor. 
AB and A’ B’, separate sunlit and darkened hemispheres at ingress; along a 6, a’ b’, sun 10° high at ingress, 
c D and C’ D’, separate sunlit and darkened hemispheres at egress; along cd, c’ d’, sun 10° high at egress. 
I, ’, are the Delislean poles for ingress; E, E’, those for egress; H, H’, the Halleyan poles. 
