"INDIAN" INK--SPANISH LICORICE--BITUMEN--CARBONFROM PETROLEUM--PROCESS TO OBTAIN GALLIC ACID--EFFECT OF SUGAR IN INK--DARK COLORED GALLS BEST FOR INK MAKING--SUBSTITUTES FOR GALLS--RELATIVE PROPORTIONS OF IRON AND GALLS--ANECDOTE OF PROFESSOR TRIALL-ESTIMATION OF SULPHATE OF COPPER--QUAINT INK RECIP...
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Updated 113 Episodes
Forty Centuries of Ink
Episode 62
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