Preface to Second Edition
The very favourable reception which my book has met with, both from the press and the public, seems to call for my grateful acknowledgment on the issue of a second edition.
In revising the former, I have added some further particulars about Faraday, especially in regard to “his method of working;” and an engraving from a photograph by Watkins, which best recalls to my recollection the features and the usual expression of the genial philosopher.