We are here to refresh. I have been working and writing a paper and that always knocks me up in health, but now I feel well again and able to pursue my subject and now I will tell you what it is about. The title will be, I think, EXPERIMENTAL RESEARCHES IN ELECTRICITY: §I. _On the induction of electric currents._ § II. _On the evolution of Electricity from magnetism._ § III. _On a New electrical condition of matter._ § IV. _On Arago’s magnetic phenomena._ There is a bill of fare for you; and what is more I hope it will not disappoint you. Now the pith of all this I must give you very briefly; the demonstrations you shall have in the paper when printed-- [Sidenote: THE PITH OF THE DISCOVERY.] § I. When an electric current is passed through one of two parallel wires it causes at first a current in the same direction[25] through the other, but this induced current does not last a moment, notwithstanding the inducing current (from the Voltaic battery) is continued all seems unchanged except that the principal current continues its course, but when the current is stopped then a return current occurs in the wire under induction of about the same intensity and momentary duration but in the opposite direction to that first found. Electricity in currents therefore exerts an inductive action like ordinary electricity but subject to peculiar laws: the effects are a current in the same direction when the induction is established: a reverse current when the induction ceases and a _peculiar state_ in the interim. Common electricity probably does the same thing but as it is at present impossible to separate the beginning and the end of a spark or discharge from each other, all the effects are simultaneous and neutralise each other-- § II. Then I found that magnets would induce just like voltaic currents and by bringing helices and wires and jackets up to the poles of magnets, electrical currents were produced in them these currents being able to deflect the galvanometer, or to make, by means of the helix, magnetic needles, or in one case even to give a spark. Hence the evolution of _electricity from magnetism_. The currents were not permanent, they ceased the moment the wires ceased to approach the magnet because the new and apparently quiescent state was assumed just as in the case of the induction of currents. But when the magnet was removed, and its induction therefore ceased, the return currents appeared as before. These two kinds of induction I have distinguished by the terms _Volta-electric_ and _Magneto-electric_ induction. Their identity of action and results is, I think, a very powerful proof of the truth of M. Ampère’s theory of magnetism. [Sidenote: A JUBILANT EPISTLE.]