G2 e ASTRONOMICAL ayp 
"J A Memoir on the Latitude of the Univerfity at Cam- 
.. dridge e With Qbfervations of the Variation and Dip of 
< the Magnetic Needle, -By SAMUEL Wirrraws, F. AA. 
Hollis. Profefèr of Matbengtics and Natural Pibf; 2 in 
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ie epa H E latitude of. Cambridge has. generally. been. fappot | 
ed to be 42? 25' north. I cannot find how early, 
by what obferver, or with what inftruments it was determined. 
The carlieft obíervations at Cambridge of which I can find any i 
account, were thofe of eclipfes made by Mr. Thomas Brattle, — — 
mentioned in the Philofophical Tranfaétions for 1704, No. 292. T 
s 1630. The aight of thefe was of a folar sea a 12, 
orien of Bojfon was TER to be 42° 20°. This tel: been 
univerfally received as the latitude ever fince that time, and va 
probably for many years before. As the ancient inftruments — — 
belonging to the College wete-bu 
amine this matter with all. the accuracy I could. With this 
view L made the following obfervations. They were taken im — : 
. the Philofophy-Chamber in Harvard-Hall, with an aftrono- a 
| mical quadrant of two feet and an half radius, TEM "s E 
finall, I was defirous to ex- ae 
