108 JNIE. C. V. WALKEE ON MAGNETIC STOEMS AND EAETH-CUEEENTS. 
Chaux de Eonds . 
. 40 S. of N. . 
O 
8|- angular hearing . 
O 
. 50 
Strasbourg . 
. 87 N. of E. . 
. 38|- angular bearing . 
CO 
St. Gall 
. 7 S. of E. . 
55 J angular bearing . 
. 40 
Paris .... 
. 24N. ofW. . 
. 72;^ angular bearing . 
. 75 
Here also, in the absence of the direction of the derived cuiTents and of other neces- 
sary data, bearing in mind also the very unequal lengths of the lines on which the 
observations were made, we cannot trace out why Paris is last instead of first in order. 
Its distance is greatest. 
We must not attempt to pursue this part of the inquiry further, for lack of data, as 
far as the Continent is concerned ; and the same may be said of the Transatlantic obser- 
vations. Here and there among the latter I find a solitary line of greatest activity given, 
but there are no other sutficient data with which to compare it ; so that no reasonable 
conclusions can be arrived at. 
Returning to England, we have traced the azimuth of the earth-currents at the 
present time in the south-eastern counties to be a few degrees north of N.E. 
The same general direction prevailed as far back as the year 1847, and in another 
district of England. A set of observations were made by Mr. Baelow at Derby, on lines 
of telegraph radiating in various directions from that town. The conclusion to which 
he arrived then was that the direction in which the currents travel “ will be between 
S. 28° W. and S. 75° W., and apparently strongest when the earth-connexions are about 
N.E. and S.W.” On treating this as I have done the results to which I had myself 
arrived, we have it thus : — 
O 
S. 28 W. or 28 E. of geog. N. ; the northern limit. 
S. 75 W. or 75 E. of geog. N. ; the southern limit. 
47 ; range. 
And we can get the N.E. bearing by dividing the range in the proportion of 17 : 30, 
o o o 
28-f 17 = 45 or N.E. 
75-30=45 or N.E. 
I 
the direction given. 
In the S.E. direction, which is at right angles with the inferred direction, he found that 
“ the motion of the needles becomes undefined.” The bearings of the groups nearest to 
S.E. which fell under his observation were S. 38° E. and S. 50° E. 
I have more than once called attention to the greater activity of the Margate — Ashford 
line ; and have also pointed out the remarkable activity manifested by the short Rams- 
gate — Margate line. There are other lines, differing but little in bearing from these, and 
equally or better favoured as to length, which have never been known to approach it in 
activity. Take, for instance, the Tonbridge — Hastings line, which differs in bearing Irom 
the Margate — Ramsgate by only 8° (see Table XI.). Currents are not very common on 
