WHARTON'S OBSERVATIONS OP THE TRANSIT. 



387 



For Internal Contact at Ingress, " Total disappearance of black hazy drop," 

 taking R = 976"-80, r = 31"-42, and mean solar parallax = 8"'950 (l + ^), 

 we have the equation 



+ 7"-52 = + o"- 1 935 n - -6 1 02 8 R. A. - -7500 8 N.P.D. o"-o3 1 3 8 t - S R 4 %r. 



For Internal Contact at Egress, " First appearance of brown haze ," taking 

 B, = 976"-82, r and n as before 



-2I788E.A. '97I78N.P.D. +o"-o332 



G. L. T. 



3 D 



