18 Mr. Kemp on the Simple and Compound Galvanic Circles. 
a distance between each pair of plates equal to the distance be- 
tween each pair of plates in the large battery, we place them se 
that the sum of the distances between the thirty-six plates may be 
equal to the sum of the distance between the four large plates, we 
would then have electricity of the same intensity, were it not for 
the dithiculty of having the liquid renewed, and also of expelling 
the hydrogen between the plates, which thereby prevents the con- 
tinuous action which goes on when the plates are placed at a greater 
distance. | 
If a few plates of a foot square were arranged in troughs, at the 
distance of three feet from each other, I am inclined to suppose, 
not having had an opportunity of trying the experiment, that we 
would not have the igniting effects of the electricity of a battery of 
the same number of plates placed at the ordinary distance; but 
only the effects of a battery of the same number of plates, about 
four inches square, placed. at the usual distance from each other. 
The chemical power of such a battery, however, would be increased. 
ART. IV.—Notes of a Tour in the Island of Jersey. By ALEX- 
' ANDER SUTHERLAND, Esq. Member of the Royal Physical So- 
ciety. 
—We lost sight of the Needles at sunset. There was little 
wind; but a heavy weltering sea throughout the night. Never- 
theless our bark drove merrily on her way, and at day-break the 
French coast, near Cape de la Hogue, was dimly visible through 
the haze of morning. At dawn the breeze died away ; and as the 
tide set strongly against us, it was found neeessary to let go an an- 
chor, in order to prevent the current from carrying us out of our 
course. The surface of the ocean, though furrowed by the long 
deep swell peculiar to seas of vast extent, levked as if oil had been 
poured upon it. The vessel pitched prodigiously too; but neither 
foam-bubbles nor spray ruffled the glassy expanse. Wave after 
wave swept by in majesty, smooth and shining like mountains of . 
molten crystal; and though the ocean was agitated to its profound- 
est depths, its convulsed bosom had a character of sublime serenity, 
which neither pen nor pencil could properly describe. 
The night-dew had been remarkably heavy, and when the sun 
burst through the thick array of clouds that impended over the 
French coast, the cordage and sails discharged a sparkling shower 
of large pellucid drops. In the course of the forenoon, a small bird 
of the linnet tribe perched on the rigging in a state of exhaustion, 
and allowed itself to be caught. It was thoughtlessly encaged im 
the crystal lamp that lighted the cabin, where it either chafed it- 
self to death, or died from the intense heat of the noon-day sun, 
which shone almost vertically on its prison. At the time this bird 

