VICE-ADMIEAL SIR C. SHAD WELL OH TERRESTRIAL MAGNETISM. 
145 
8. Observations at Ningpo. — At Ningpo, on Oct. 6, 1858, the dip was found to be 
48° 3 ;, 5 N., and the observation being repeated on April 11, 1859, gave 43° 7'‘9 N. 
Hence, reducing to the same epoch, we have 1859 - 02, mean dip 43° 5 ,- 7 N. 
Comparing this with the observation recorded in Table II., No. 34, 1872 , 94, 44° 5 ,- 8 N., 
we find the change in 13 ‘93 years to have been 60 ?, 1. 
And 1 ~^ = 4' - 31, the mean annual change. North dip increasing. 
9. Observations at Nagasaki , Japan. — The observations at Nagasaki recorded in 
Table II., Nos. 42-45, present some singular discordances, which I can only account 
for on the supposition of some local disturbances affecting the observations. The places 
of observation were about 8 feet above the level of the sea, on a ridge of land under high 
cliffs. I was under the impression at the time that the spot of observation of No. 42 
was as nearly as possible, as far as I was able to recognize the position, in the same 
place as where I had previously observed on Sept. 12, 1859, when I obtained 45° 53'*7 N. 
as the then value of the dip. 
The anomalous results obtained on June 1, 1874, at a position not 100 yards distant, 
but which I thought might be slightly more convenient, induced me to repeat the 
observation at each of the selected stations, on the two following days, the results 
confirming those previously found at each place, showing that the discordances were 
real, and not apparent only, depending on some accidental errors of observation. 
Under these circumstances I cannot treat the observations in the same manner as I 
have done those at other stations, and the attempt to indicate approximately the value 
of the annual change must be abandoned. 
The inference I would draw from this experience is that jt is not advisable to observe 
near high masses of land, which may possibly, by their attraction, influence the indi- 
cations of the needles*. 
10. Observations at Yokohama, Japan. — On Oct. 25, 1859, or 1859‘81, the dip taken 
at Kanogowa, which was the then site of the British Consulate, was 48° 8'’7 N. 
Kanogowa has since been given up as a settlement for the foreign merchants, and 
Yokohama has been selected instead. 
* [With reference to the discrepancies noticed at Nagasaki between the results at two stations not far distant, 
having reexamined my notes, and having also referred to the gentlemen who assisted me on the occasions 
referred to, I wish to add the following remarks : — - 
The spot of observation selected on May 31, 1872, and on June 2nd, 1874, for observations Nos. 42 & 44, 
was on a piece of level ground near the edge of the water of the harbour, behind it was a low cliff about 8 feet 
high and about 15 yards distant, beyond which a steep wooded slope rose upwards to the summit of the hills in 
the rear. 
At the second station, where observations 43 and 45 were taken on June 1st and 3rd, 1874, the hill had been 
cut away so as to obtain a level space for the formation of a dock. I estimate the distance from the cliff as about 
50 yards, the height of the cliff about 40 feet, the land in its rear sloping upwards, and forming hills from 
200 to 300 feet high. 
The two stations were about 90 or 100 yards distant, and their height above the sea-level about 8 feet. — 
C. S., June 3, 1877.] 
MDCCCLXXVII. y 
