Let a second negative now be taken,
giving the same exposure as before, and it will be found that if
the first one were correctly timed the second will be considerably
under-exposed. Yet the sitter was at the same distance from the window
in each case.
This shows the advisability of utilizing all the direct light it
is possible to do, and thereby leaving as little as we can to be
accomplished by the reflector. When the sitter is arranged to the best
advantage at a window of ordinary size, fully exposed pictures can
generally be obtained with a portrait lens (full opening) in fairly good
light, on moderately sensitive plates, with one or two seconds' (or even
less) exposure. If a longer exposure than this be necessary, it
may fairly be assumed that the lighting has not been properly
managed.--_British Journal of Photography_.
* * * * *
A NEW METHOD OF PREPARING PHOTOGRAPHIC GELATINE EMULSION BY
PRECIPITATION OF THE BROMIDE OF SILVER.
By FRANZ STOLZE, Ph.D.
I consider the method of precipitation described below as far superior
to any other hitherto employed, particularly on account of its
infallible certainty.
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