926 Scientific Intelligence. [Marcn, 
The comparison of the Indian measurement with the French 
measurement, gives =54-7; for the compression. 
The comparison of the Indian measurement with the English 
measurement gives 3.57. : 
While the comparison of the Indian with the Swedish mea- 
surement gives 5,4-;, for the compression. 
The mean of these three comparisons gives 7,4.4,, or almost 
=i, for the compression at the poles. 
3. From the preceding compression,of ,1,, Col. Lambton has 
calculated the length of a degree of latitude from the equator to 
the pole. The following table exhibits the result of this calcu- 
lation. The last column of the table gives the length of the 
degree of longitude at the latitude indicated in the first column 
of the table. 
Wat, Degrees pa? meri- act oe ~ a he D egrees of longitude. 
604592 60848-0 60848-0 
3 60460°8 60848-4 60765:0 
6 60465°6 60850-1 60516°8 
9 60473°5 60852°8 60103°6 
12 60484°5 60856°5 59526°7 
15 60498°4 608611 : 58787°3 
18 6051571 60866°7 57887°7 
21 |; 60534°3 60873°2 56830°0 
24 605560 60880°5 55628: 
27 60579°8 60888-5 54252-0 
30 60605-5 60897-1 52738:4 
33 60632:7 60906-2 51080:2 
36 60661°3 60915°8 49281-9 
39 60690:8 60925°7 47348-2 
42 60721:3 60935-7 45284-0 
45 60751°8 60946-1 43095°4 
48 60782°3 60956°4 40787°8 
51 60812°5 60966°5 38367°5 
54 60842: 1 609765 358411 
57 60870-7 60986: 1 33215°4 
60 60898-0 60995:2 30497-6 
63 60923°7 61003-8 27695°2 
66 60947°5 61011°8 248157 
69 60969: 1 610189 21867-2 
72 60988-3 610256 18857-9 
75 61005°1 61031-0 15796-0 
78 61018-9 61035°8 12690:1 
81 61029-9 61039°5 9548-7 
84 61037-8 61042-1 6380-6 
87 61042-6 610437 31948 
90 6104473 61044:3 — 
