the trouble and expense of seeking instruction from professors,
which in many cases within my own knowledge has prevented
persons from embracing the profession.

To English authors I am principally indebted for that portion
of my work relating to Photogenic drawing on paper.
To them we owe nearly all the most important improvements in that
branch of the art. Besides, it has been but seldom attempted
in the United States, and then without any decided success.
Of these attempts I shall speak further in the Historical
portion of this volume.

Every thing essential, therefore, to a complete knowledge of the whole art,
comprising all the most recent discoveries and improvements down to the day
of publication will be found herein laid down.




INTRODUCTION




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

Dear Sir,--In submiting 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,