The last paragraphs of the Primer, verbatim:

“Conclusion:

You have now learned what the electric current can do. How, in the first place, it can heat a fine wire through which is passes; how, secondly, it can decompose water and other compounds; how, thirdly, it can make a piece of soft iron into a powerful though temporary magnet; how, fourthly, it can make a piece of hard steel into a permanent magnet; and fifthly and lastly, how it can defect the compass needle, rendering it thereby possible to telegraph to greet distances.

We cannot enter more fully into this very interesting subject, but in conclusion let me remind you that you have now learned something about the active moods of matter. We spoke first of all about moving bodies, then about vibrating bodies, then about heated bodies, and lastly about electrified bodies; and we have tried throughout to show you that the activity which a body may possess is never really lost. It may, no doubt, pass to some other body, or it may change its form, going from visible energy into sound, or into heat, or into electricity, or changing about in many different ways. but it is really lost no more than a particle is lost,

Indeed just as the Science of Chemistry is built upon the principle that matter only changes form, going from one combination to another. and does not absolutely disappear, so the science of Physics is founded upon the principle that activity or energy only changes form and never absolutely disappears. This, however, is a principle the full development of which must be preserved for a future stage.”

From the Science Primer: PHYSICS

Edited by Professors Huxley, Roscoe and Balfour Stewart

London, New York; Macmillan and Co. 1888