John Tyndall.
Hind Head,
December, 1893.



[Note.--It was, I believe, my husband's intention to substitute
this Preface, written a few days before his death, for all former
Prefaces. As, however, he had not the opportunity of revising the
old prefatory pages himself, they have been allowed to remain just
as they stood in the last edition.

Louisa C. Tyndall.]


Preface to the fourth edition.

When consulted a short time ago as to the republication of 'Faraday
as a Discoverer,' it seemed to me that the labours, and points of
character, of so great a worker and so good a man should not be
allowed to vanish from the public eye. I therefore willingly fell
in with the proposal of my Publishers to issue a new edition of the
little book.

Royal Institution,
February, 1884.


Preface to the second edition.