394 NOTES ON VENUS — CAMERON. 



made in the morning ; it was far longer since one had been made 

 on Venus ; and my eastern horizon was less favorable for low 

 observations and much less familiar to the observer than the 

 western. But the night of the 13th looked as if it would keep 

 clear until dawn, and it seemed a shame that the promising 

 opportunity should be lost. If only some star could be found 

 with nearly the same declination as Venus, which would rise 

 about 10 or 11 that night, and let itself be seen above the tree- 

 tops in the east, the morning observation would be assured. 

 Such a star was found, and when its position had been observed 

 a note was jotted down that, at a certain hour next morning, 

 looking from a certain window, Venus should be seen at the top 

 of a certain tree. When the hour came I was at the window and 

 Venus was at the top of the tree. 



