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CONDUCTED BY WILLIAM AND ROBERT CHAMBERS, EDITORS OF 'CHAMBERS'S INFORMATION FOR THE PEOPLE,' 'CHAMBERS'S EDUCATIONAL COURSE,' &c.

No. 425.   New Series. SATURDAY, FEBRUARY 21, 1852. Price 1½d.

'THE MAGNETOSCOPE.'

In No. 415 of this Journal, we printed a paper with the above title, merely as one likely to excite interest, but warning the reader that we did not ourselves vouch for its statements. This caution appears to have been very necessary; for Dr Madden—the substance of whose lecture was given in the article—now declares, that 'very shortly after its delivery, he, in common with many others, detected a serious fallacy in the whole series of experiments; and that, by prosecuting his inquiry in this new direction, he ascertained that not one of the hitherto recorded experiments can be looked upon as proving the existence of magnetic currents at all.' The pendulations, it seems, are caused solely by 'slight mechanical impulsions, unconsciously or half consciously conveyed to the instrument by the luckless experimentalist.'

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