428 Mr, Wood house's account of, &c. 
My chief study, since the fixing up of the instrument, has 
been to obtain a thorough knowledge of it: to find out its 
defects, should it have any, their nature and degree. The 
observations of stars have been chiefly made for, and have 
served that end ; but they are not, I tliink, otherwise useful, 
nor worth registering. 
