Lubricating oilsโIV: The Gumming of lubr
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Seton, Antony
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Article
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1929
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Wiley (John Wiley & Sons)
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contin~es, imwcvcr, thnt Noclfcr 110s produccd bands "by tliffnsing silver nitrntc into p w e [thc italics arc inincl xrlntin. Strata wcrc nlso produccd when gelatin gels w r c subjcctcd to tlic nction of tanning ngcnt,s." dctnnlly, n 1 0 ~l l ~r l ~ Iiimsclf says that hc uscd coninwr-cia1 gelatin,