GRAPHOMETER.
INDEX.

INTRODUCTION

New York, January 27, 1849.
E. ANTHONY, ESQ.

Dear Sir,--In submitting the accompanying "History and Practice of
Photography" to your perusal, and for your approbation, I do so with
the utmost confidence in your ability as a practical man, long engaged
in the science of which it treats, as well as your knowledge of the
sciences generally; as well as your regard for candor. To you,
therefore, I leave the decision whether or no I have accomplished my
purpose, and produced a work which may not only be of practical benefit
to the Daguerrean artist, but of general interest to the reading
public, and your decision will influence me in offering it for, or
withholding it from, publication.

If it meets your approbation, I would most respectfully ask permission
to dedicate it to you, subscribing myself,

With esteem,
Ever truly yours,
HENRY H. SNELLING

New York, February 1st, 1849.
Mr. H. H. SNELLING.

Dear Sir--Your note of January 27th, requesting permission to dedicate
to me your "History and Practice of Photography," I esteem a high
compliment, particularly since I have read the manuscript of your work.

Such a treatise has long been needed, and the manner in which you have
handled the subject will make the book as interesting to the reading
public as it is valuable to the Daguerrean artist, or the amateur
dabbler in Photography. I have read nearly all of the many works upon
this art that have emanated from the London and Paris presses, and I
think the reader will find in yours the pith of them all, with much
practical and useful information that I do not remember to have seen
communicated elsewhere.

There is much in it to arouse the reflective and inventive faculties of
our Daguerreotypists. They have heretofore stumbled along with very
little knowledge of the true theory of their art, and yet the quality
of their productions is far in advance of those of the French and
English artists, most of whose establishments I have had the pleasure
of visiting I feel therefore, that when a sufficient amount of
theoretic knowledge shall have been added to this practical skill on
the part of our operators, and when they shall have been made fully
acquainted with what has been attained or attempted by others, a still
greater advance in the art will be manifested.

A GOOD Daguerreotypist is by no means a mere machine following a
certain set of fixe