510 Lieut . Col. Lambton’s abstract of the results deduced 
Table II. 
Degrees, 
Latitudes. 
+ 
0 
- 
- 
6047 5,47 
O 
9 
34 
44 
m ,<» 
+ 
d 
- 
- 
- 
60478,99 
10 
34 
44 
W (3) = 
+ 
Q 
(Sin.*/ (3) - 
- Sin. 
60482,84 
li 
34 
44 
+ 
Q 
(Sin.V (+) - 
- Sin. 
■/ ,l ) 
60487,02 
12 
34 
44 
m (s) = 
m ^ 
+ 
Q 
(Sin. 2 / s) - 
— Sin. 
) 
60491,53 
*3 
34 
44 
m (l) 
+ 
Q 
(Sin. 7 (<5) - 
- Sin. 
7 (,) ) 
60496,34 
H 
34 
44 
rn> ^ 
+ 
o 
(Sin.V 171 - 
- Sin. 1 
'/ (,) ) 
60501,47 
15 
34 
44 
m < 8, = 
+ 
Q 
CO 
1 
00 
C 
g. 
60506,91 
16 
34 
44 
m^= 
m> 1 * 
+ 
Q 
(Si n.V (9) - 
- Sin. 
7 (,) ) 
60512,64 
17 
34 
Sum 
544433 > 21 
: A 
From inspecting these two tables, it appears that the degree 
in latitude 13 0 34/ 44" is nearly the same in each, and the 
mean is 60491,46 fathoms; which certainly must be near 
the truth. I shall therefore adopt it with the compression 
~o f° r computing the general tables of degrees for every 
third degree of latitude from the equator to the pole. 
With respect, however, to the compression, that nothing 
may be left undone to give full and entire satisfaction on this 
subject, I shall here add an investigation similar to that 
given by Professor Playfair, in the 5th vol. of the Edinburgh 
Philosophical Transactions, where, in place of using the 
measures of degrees due to particular latitudes, two measured 
arcs of large amplitudes are made use of, the latitudes of 
whose extremities have been determined with great accuracy. 
