Le Lycée of 1st of January, 1832, No. 36, in an article written after the
receipt of my first unfortunate letter to M. Hachette, and before my papers
were printed, reasons upon the direction of the induced currents, and says,
that there ought to be "an elementary current produced in the same
direction as the corresponding portion of the producing current." A little
further on it says, "therefore we ought to obtain currents, moving in the
_same direction_, produced upon a metallic wire, either by a magnet or a
current. M. Ampère _was so thouroughly persuaded that such ought to be the
direction of the currents by influence_, that he neglected to assure
himself of it in his experiment at Geneva."

It was the precise statements in Demonferrand's Manuel, agreeing as they
did with the expression in M. De la Rive's paper, (which, however, I now
understand as only meaning that when the inducing current was changed, the
motion of the mobile circle changed also,) and not in discordance with
anything expressed by M. Ampère himself where he speaks of the experiment,
which made me conclude, when I wrote the paper, that what I wrote was
really his avowed opinion; and when the Number of the Lycée referred to
appeared, which was before my paper was printed, it could excite no
suspicion that I was in error.

Hence the mistake into which I unwittingly fell. I am proud to correct it
and do full justice to the acuteness and accuracy which, as far as I can
understand the subjects, M. Ampère carries into all the branches of
philosophy which he investigates.

Finally, my note to (79.) says that the Lycée, No. 36. "mistakes the
erroneous results of MM. Fresnel and Ampère for true ones," &c. &c. In
calling M. Ampère's results erroneous, I spoke of the results described in,
and referred to by the Lycée itself; but _now_ that the expression of the