l io Mr. Lax’s Method of finding the Latitude of a Place , 
when the sun was near the meridian ; and with these I will 
now calculate the latitude, in order to apply the ist and 2d 
tables, and likewise to exemplify the method of combining 
several observations together. The two first altitudes were 
taken in the morning, one at 19' 24", the other at 17' 40" 
before twelve o'clock, and were respectively 40° 49' 6 ", and 
4 0 °5° / 5i ,/ > the two last in the afternoon, one at 17' 53", 
the other at 19' 44" past twelve o'clock, and were respectively 
4 °° 49 ' 5 °"i and 4°° 48' 18". Now the longitude, found by 
the eclipses of Jupiter’s satellites, is nearly i° 40' west of 
Greenwich ; and hence the declin. appears to have been, at the 
two first observations, 5 0 2 6 ' 23", and at the two last, 5 0 25' 47"; 
the interval betwixt the first and second, and betwixt the third 
and fourth, being so small that we may consider the declin. as 
remaining constant during each of these times. 
Observation ist. 
Observ. 2d. 
Observ. 3d. 
Observ. 4th. 
Lat. 54 0 29' 
Lat. 54 0 29' 
Lat. 54 0 29’ 
Lat. 54 0 29' 
Log. of a — 9,8153538 
9,8156096 
9,8154610 
9,8152367 
— — d — 8,9768457 
8,9768457 
8,9760047 
8,976004 7 
1 - 9 ' 9 ioS 959 
9 > 9 io 5959 
9,9105959 
9,9105959 
am 3 
- n r \ n "7 *7 n T 7 7 
20,9281680 
20,9288604 
20,9286361 
r m 3 
T no- — — — — t Q x 
- JJ - 20,9279122 
liUgt — — - i Oj 9 l|i. 
= IO ’ 4 - 6 395 61 
10,4640840 
10,4644302 
10,4643180 
= 9,4150276 
Sy j 
Log. tang. “ 10,436 6767 
10,4368218 
IO > 437 2I 4 I 
!o,437°86i 
Log. cosine — 9,9847972 
2 x log. tang. = 20,8733534 
20,8736436 
20,8744282 
20,8741722 
2 x l cos. = 19,9695944 
Log. of r — 8,9788063 
8,9788063 
8 » 977957 8 
8,9779578 
Log. v — 3,1015 
s — 10,1464648 
10,1464648 
10,1464648 
10,1464648 
s — 10,1464648 
Comput. log. y = 9,9986245 . 
• 9 ’ 99 8 9 H 7 - 
. 9,9988508 . 
.9,9985948. 
Log. gc — 3,218 
