BROWNE'S OBSERVATION OF EGRESS, AT MOKATTAM. 



291 



was struck by the exact resemblance to model practice. Some of the 

 measures were obtained without the intervention of the darkening wedge, but 

 it was generally required. My wife called aloud the seconds from the 

 Sidereal Clock Dent 2009, and recorded the observations : 



MICROMETER HEADINGS for the DOUBLE DIAMETER of VENUS. 



rev. 

 26-841 



26-85o 

 26-842 

 26-780 

 26-793 



I7'i35 



The zero, or reading for coincidence of images, was approximately 22 r< 0. 

 The smaller readings are in a negative, the larger in a positive, direction from 

 zero. 



MICROMETER READINGS for the DISTANCE between the NEAR LIMBS of the SUN 

 and VENUS, along the Line of Centers. 



Bad. 



P P 



