The effects of this magnetic storm were apparent upon the wires during a considerable portion of Saturday evening, and during the whole of the next day. At 6, P.M., the line between Boston and New Bedford (sixty miles in length) could be worked only at intervals, although, of course, no signs of the aurora were apparent to the eye at that hour. The same was true of the wires running eastward through the State of Maine, as well as those to the north.

The wire between Boston and Fall River had no battery upon it Sunday, and yet there was an artificial current upon it, which increased and decreased in intensity, producing upon the electromagnets in the offices the same effect as would be produced by constantly opening and closing the circuit at intervals of half a minute. This current, which came from the aurora, was strong enough to have worked the line, although not sufficiently steady for regular use.

The current from the aurora borealis comes in waves,—light at first, then stronger, until we have, frequently, a strength of current equal to that produced by a battery of two hundred Grove cups. The waves occupy about fifteen seconds each, ordinarily, but I have known them to last a full minute; though this is rare. As soon as one wave passes, another, of the reverse polarity, always succeeds. I have never known this to fail, and it may be set down as an invariable rule. When the poles of the aurora are in unison with the poles of the current upon the line, its effect is to increase the current; but when they are opposed, the current from the battery is neutralized,—null. These effects were observed at times during Saturday, Saturday evening, and Sunday, but were very marked during Sunday evening.

It is hardly necessary to add here, that the effect of the aurora borealis, or magnetic storm, is totally unlike that of common or free electricity, with which the atmosphere is charged during a thunderstorm. The electricity evolved during a thunder-storm, as soon as it reaches a conductor, explodes with a spark, and becomes at once dissipated. The other, on the contrary, is of very low tension, remains upon the wires sometimes half a minute, produces magnetism, decomposes chemicals, deflects the needle, and is capable of being used for telegraphic purposes, although, of course, imperfectly.

Mr. 0.S. Wood, Superintendent of the Canadian telegraph-lines, says:—"I never, in my experience of fifteen years in the working of telegraph-lines, witnessed anything like the extraordinary effect of the aurora borealis, between Quebec and Father Point, last night. The line was in most perfect order, and well-skilled operators worked incessantly from eight o'clock last evening till one o'clock this morning, to get over, in even a tolerably intelligible form, about four hundred words of the steamer "Indian's" report for the press; but at the latter hour, so completely were the wires under the influence of the aurora borealis, that it was found utterly impossible to communicate between the telegraph-stations, and the line was closed for the night."

We have seen from the foregoing examples that the aurora borealis produces remarkable effects upon the telegraph-lines during its entire manifestation. We have, however, to record yet more wonderful effects of the aurora upon the wires, namely, the use of the auroral current for transmitting and receiving telegraphic dispatches. This almost incredible feat was accomplished in the forenoon of September 2, between the hours of half past eight and eleven o'clock, on the wires of the American Telegraph Company between Boston and Portland, and upon the wires of the Old Colony and Fall River Railroad Company between South Braintree and Fall River.

The auroral influence was observed upon all the lines running out of the office in Boston, at the hour of commencing business, (eight o'clock, A. M.,) and it continued so strong up to half past eight as to prevent any business being done; the ordinary current upon the wires being at times neutralized by the magnetism of the aurora, and at other times so greatly augmented as to render operations impracticable. At this juncture it was suggested that the batteries should be cut off, and the wires simply connected with the earth.

It is proper to remark here, that the current from the aurora coming in waves of greater or less intensity, there are times, both while the wave is approaching and while it is receding, when the instruments are enabled to work; but the time, varying according to the rapidity of the vibrations of the auroral bands, is only from one quarter of a minute to one minute in duration. Therefore, whatever business is done upon the wires during these displays has to be accomplished in brief intervals of from quarter to half a minute in duration.

During one of these intervals, the Boston operator said to the one at
Portland,—

"Please cut off your battery, and let us see if we cannot work with the auroral current alone."