102 
Mr. Cavendish's Obfervatwns 
according to the fumy of Huntingdonfhire, published by 
Jefferies, is 5 2° 19' 50 " ; fo that we may fuppofe it to be 
feven geographical miles north of Camoudge, and by the maps 
it feems to be about 18 fuch miles weft of it : and Blockley is 
by the map 1 2 geographical miles fouth and 72 weft of 
Cambridge. 
At Cambridge the obiervations ot its track fee in to hate 
been made at about 9 h. I5 / P.M. or 8 h. fdeieal time. 
At Kimbolton, allowing for trie difference of meiidians, 
they could hardly have been made more than § fooner ; and 
at Blockley they were moft likely made nearly at the faznv 
time as at Cambridge. 
At Blockley the arch palled about y° iouth of tire zenith , 
but it is unneceflary to determine this point with precifion. 
At Kimbolton it was found by a quadrant to pafs n 3 to the 
fouth of it ; and at Cambridge it was obferved to pafs through 
2 and e Tauri, /3 Aurigae, 6 Urfae majoris, Cor Caroii, and 
Ardlurus. Now, if an arch was drawn through thefe ftars, 
it muft, I think, have appeared fenfibly waved to the eye; 
whereas Mr. Wollaston did not take notice of any crooked- 
nefs in this part of its courfe. It is moft likely, therefore, 
that the middle of the arch muft have paffed to the fouth of 
/3 Aurigae, and to the north of 6 Urfas; and if a circle is 
drawn through S Tauri, Arflurus, and a point one degree 
north of the zenith, it will differ but little from a great circle, 
will agree as well with thepofitions of thefe ftarsas any regular 
line which can be drawn, and will pafs 2| degrees below (l 
Aurigae, and as much above fiUrfae ; which is not a greater 
difference from obfervation than may well have taken place, 
' confidering how much care and acquaintance with the fixed 
ftars are required to determine a path by them fo nearly. 
7 
The 
