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TO PHOTOGRAPHERS.--Pure Chemicals, and every requisite for the practice
of Photography, according to the instructions of Le Gray, Hunt,
Brébisson, and other writers, may be obtained, wholesale and retail, of
WILLIAM BOLTON (formerly Dymond & Co.), Manufacturer of pure Chemicals
for Photographic and other purposes. Lists may be had on application.
Improved Apparatus for iodizing paper in vacuo, according to Mr.
Stewart's instructions.