Chapter III: TECHNOLOGY.--On Various Toning Baths.--Several
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experiments.--By W. M. ASHMAN. 7456
Coating Plates with Gelatine Emulsion.--5 figures. 7457
Iodo-chloride of Silver Emulsion.--By V. SCHUMANN 7458
Apparatus for Saturating Water with Sulphurous Acid.--1
engraving. 7458
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Scientific American Supplement, No. 467, December 13, 1884Chapter III: TECHNOLOGY.--On Various Toning Baths.--Several
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