made in the Auftrian Netherlands. 643 
Having on the 21ft, 23d, 24th, 25th of April 1775, 
obferved the zenith diftances of 5 and £ urfse majoris 
with the face of the quadrant to the Eaft and Weft, in 
order to determine the error of the line of collimation, 
Jt 
which I found to be 25,2, to be fubtraCted from the ob- 
ferved zenith diftances, I computed the latitude likewife 
from the fame ftars, and can depend the more upon the 
refult from them, as, being fo near the zenith, they were 
little affected by refraction, and not at all by the error of 
the line of collimation, becaufe obferved both on the 
quadrantal arc and arc of excefs. 
a / // 
By t urfae majoris the latitude was found, — - 5° 53 lJ r 
By? urfae majoris the latitude was, ■ — • 5 ° S3 -9i 
By a mean of the Sun and liars as above, — 50 52 59,4 
• Now, if a mean of the whole be taken, the latitude North ! 
of my obfervatory at Louvain will be — — | 5°53 3 
4 K 2 
Longitude 
