26 
MR. A. W. RtiCKER AND DR. T. E. THORPE ON A MAGNETIC 
Comparisons at Kew of Dip Circle, No. 94, with the Kew Standard. Observer, 
Mr. Watson. 
1)ate. 
s 
i Survey Instrument). 
K 
(Kew Instrument). 
K —S =/I. 
K-/1=K'. 
S-K'. 
Oct. VS, 1891 . . 
„ 14, „ . . 
., 16, .. . . 
„ 16, „ . . 
„ 16, „ . . 
67 36-7 
67 31-2 
67 32-3 
67 31-2 
67 30-4 
6"7 31-3 
67 31-7 
67 31-9 
67 3T2 
67 30-5 
+ 0-6 
-f- O'o 
-0-4 
0-0 
+ 0-1 
67 31T 
67 31'5 
67 3T7 
67 31-0 
67 30-3 
-0-4 
-0 3 
+ 0-6 
+ 0-2 
+ 0-1 
/i=+0-2 
Lleau = 
= ± 0-3 
Feb. 12, 1892 . . 
67 31-4 
67 30-4 
-1-0 
67 30-8 
9-0-6 
ly yy 
67 30-6 
67 30-3 
-0-3 
67 307 
-0-1 
12, ., . . 
67 30-1 
67 30-3 
+ 0-2 
67 307 
— O'b 
II 
1 
o 
4- 
Mean = 
1 
= ± 0-4 
Oct. 7, 1892 . . 
67 29-7 
67 29-0 
-0-7 
67 29-5 
■f 0-2 
7 
yy * y yy • • 
67 29-7 
67 28'8 
-0-9 
67 29-3 
-PO'4 
„ 10, „ . . 
67 30’5 
67 29-.5 
-1-0 
67 30-0 
+ 0-5 
.. 10, . . 
67 29-5 
67 30-0 
+ 0-5 
67 30-5 
-10 
o 
1 
II 
Alean : 
= ± 0-5 
Comparisons at Kew of Dip Circle No. 99 with the Kew Standard. 
Date. 
Observer. 
S 
(Survey 
Instrument). 
K 
(Kew 
Instrument). 
II 
in 
1 
K-/3=K'. 
S-K'. 
Oct. 13, 1891 . . . 
IV. 
6°7 30-6 
67 30-9 
0*3 
67 oO'S 
+ 0-1 
14 
4V. 
67 32-3 
67 32-3 
0-0 
67 31-9 
+ 0-4 j 
„ 16, ,. . . . 
G. 
67 32-0 
67 32 0 
0-0 
67 31-6 
+ 0-4 
„ 16, „ . . . 
G. 
67 .30-8 
67 31-5 
-fO-7 
67 31-1 
-0-3 
1 „ 16, „ . . . 
G. 
67 30-.5 
67 30-8 
-t-0-3 
67 30-4 
+ 0-1 
yy ■ 
G. 
67 29-3 
67 30 5 
-fl-2 
67 30-1 
-0-8 ; 
i 
13= +0-4 
Mean 
= ± 0-3 
Oct. 11, 1892 . . . 
AV. 
67 31-8 
67 32-3 
-fO-5 
67 31-8 
0-0 
AV. 
67 32-1 
67 32-0 
-0-1 
67 31-5 
-fO-6 
AV. 
67 31-2 
67 31-7 
+ 0-5 
67 31-2 
0-0 
JJ 1*^) )) ... 
AV. 
67 30-7 
67 31-7 
-pTO 
67 31-2 
-0-5 
f3= + 0-o 
Mean 
= ± 0-3 
1 
