92 REPORT—1896. 
The means of six experiments made in July by the first method with 
No. 94, and of a like number with the Kew instrument, were 67° 23’°8 and 
67° 23/6, so that the average result with No. 94 was 0'2 higher. 
The means of five experiments with each instrument in October were 
67° 23'-2 with No. 94 and 67° 22/0 with the Kew standard, so that the 
difference had apparently increased bya minute. It will be seen from the 
above table that these results do not differ much from those obtained 
when the comparison was made with the recording instruments, and that 
therefore the method by which they were obtained, which was perforce 
adopted at Falmouth, Stonyhurst, and Valentia, is sufficiently good for 
the purpose in view. 
In the table each needle is treated separately. The mean of the 
two differences obtained in July and October, viz.: B=—0O'6, is in 
close accord with the values obtained in February and October, 1892, 
when No. 94 was last compared with Kew. They were —0'*4 and —0'5 
respectively. 
Summing up the results obtained at Kew we get the following table :— 
wt K-S=8 
Declination . C A —O0"4 
Horizontal Force . , —0:00011 (C.G.8.) 
Dip. ‘ : : ° —0'6 
Falmouth Observatory. 
The observations at Falmouth were made by Professor Riicker, using 
the survey instruments, and by the superintendent, Mr. E. Kitto, who used 
the Falmouth instruments. 
On the first day Professor Riicker also used the Falmouth magneto- 
meter to make sure that no personal equation of importance affected the 
results. 
Comparison of Magnetometer No. 70 with the Instrument used in the 
Falmouth Observatory. . Declination. 
Instru- | | 
Date Time | mentand | Declination | Carve F—C=Z,S'—C=Z | t-B- fo=8 
Observer | ae) | wy 
. : Or, 7, ° ! ! | Ul ' 
August 6 ) aes sf nhs ce 1853°7 | 1849-9 | 3:8) 4.5 a 
be 1033/ F R| 564 Bia idea | 4 ol deo 
55 153 Sie aetst alii | 57°8 53:7 | — | aaf 
August7 |10 6| F K |} 530 48°5 | 45 7 +02 
a 1214; S R UO ie2, 56:9 | — 4:3 | 3; 
August 8 OM52))) KG 18 49°6 45:0 | 46 = 0-2 
. 125375 98) 4B 58-0 536 | — sa} x 
August 9 952) F K 525 48:0 | 4:5 — v1 
5 12° 01.8: iB 577 521 | — 56} ee 
August 10 | 958) F K 52°2 44-9 | 7-3 — 1-9 
= 1237| S BR 59-4 B20 — sat : 
August 12 9°53.) EF .K 50:7 44-7 | 6-0 — 1:0 
a 1243| S R 57-0 52:0 | — oar = 
Mean . -- — | = — |— — +0"4 
