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ASTRONOMICAL PHOTOGRAPHY
PRESENTS ONE OF THE SEVEREST
TESTS POSSIBLE FOR A LENS.
ARE ALREADY IN USE AT THE
HARVARD OBSERVATORY. YOU
WILL HEAR MORE OF THEM LATER.
WRITE
FOR 4A BOOKLET
TAYLOR.TAYLOR.&HOBSON. Ltd.
ST. JAMES BUILDING,
BROADWAY AND 26th STREET,
NEW YORK.
Platinotype Process
will appeal to you becasue of the EASE of its
MANIPULATION. There are grades of surface
from extrarough to smooth, all yielding those
exquisite results peculiarto genuine W.&C,
PLATINOTYPE ' ' ' '
TRY THE NEW EXTRA ROUGH IF YOU
ADMIRE A PAINTING LIKE EFFECT
A LIBERAL SAMPLE PACKAGE, with DEVELOPER, 50c.
BOOKLET FREE
WILLIS & CLEMENTS, Philadelphia, Pa.
1624 Chestnut Street
PRESENTS ONE OF THE SEVEREST
TESTS POSSIBLE FOR A LENS.
ARE ALREADY IN USE AT THE
HARVARD OBSERVATORY. YOU
WILL HEAR MORE OF THEM LATER.
WRITE
FOR 4A BOOKLET
TAYLOR.TAYLOR.&HOBSON. Ltd.
ST. JAMES BUILDING,
BROADWAY AND 26th STREET,
NEW YORK.
Platinotype Process
will appeal to you becasue of the EASE of its
MANIPULATION. There are grades of surface
from extrarough to smooth, all yielding those
exquisite results peculiarto genuine W.&C,
PLATINOTYPE ' ' ' '
TRY THE NEW EXTRA ROUGH IF YOU
ADMIRE A PAINTING LIKE EFFECT
A LIBERAL SAMPLE PACKAGE, with DEVELOPER, 50c.
BOOKLET FREE
WILLIS & CLEMENTS, Philadelphia, Pa.
1624 Chestnut Street