MADE AT CORNBROOK. ' 203 



instrument was moved horizontally towards the 

 west, until the sun's lower limb again touched 

 the horizontal, and his western limb the vertical 

 wire : — having read off, on the horizontal circle, 

 the distance which the instrument had been 

 moved, and placing the telescope at half that 

 distance, I directed it towards the ground, and 

 placed a temporary mark in the situation to 

 which it pointed, until I had made some further 

 observations on the sun, and also on several 

 fixed stdrs. 



Being at length satisfied that a true situation 

 had been found, I placed a permanent meridian 

 mark, in a field, at the distance of 663 feet 

 from the instrument. 



Of the various methods given to find the lati- 

 tude of a place, perhaps the most easy is to take 

 the altitude of the sun when he is in the equator 

 at noon; but, although he is in the equator 

 twice every year, yet it very rarely occurs, that 

 he is at the same time on the meridian of the 

 place of observation ; and there being very few 

 stars in the equator upon which observations can 

 be made, the opportunities to find the latitude 

 in this way, are of very rare occurrence. There 

 are, however, other means presented to us, for 

 attaining this object; such as observations on 

 2c2 



