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." The Portland operator replied,-- "I will do so. Will you do the same?" "I have already done so," was the answer. "We are working with the aid of the aurora alone. How do you receive my writing?"