144 ASTRONOMICAL OBSKRVATIOXS 



might have, I have examined twenty-three of those 

 measurements, made between the 7th of March and 

 the 7th of June (being all of which I have any record) 

 by raking the medium of the sun's diameters, as mea- 

 sured on the limb, to the right and left of zero, and 

 comparing it with the diameter for that day, as laid 

 down in the Ephemeris. Jt will appear, from a list 

 of 'hose observations, that my measurements com- 

 >nly exceeded those given in tjie; JZphemetisi but 

 the greatest excess was 25", 



MENSURATIONS 



