"The principle of these papers lies in the fact that an iron salt is
sensitive to light, and the exposure is made upon the iron salt, and not
the metal which forms the image. This iron salt when placed in the
developer is released and reduces the metal which forms the image. It is
apparent, therefore, that since the actual exposure is made upon a salt
which is not the image, and that this sensitive salt is washed away after
development, definition is not as precise as in another paper wherein the
sensitive metal salt is reduced. So these papers soften the quality of
the definition somewhat ....."
Among other items of interest, on page 159 Gillies explains that,
"Motion picture people seldom understand what a picture is and their work
has degenerated into a form of photographic trickery which cannot exist
very much longer as it is, since it is so absurd and is done by persons
who know little about the better side of photography. The business is
growing into a large industry and is in the hands of ex-furriers and
vaudeville men, who will soon pass on to give way to those who really can
add something to the work."
(So right, of course.)
Cheers,
Judy