Philosophical Transactions 92, pp.12-48 & 387-97. London: W. Bulmer for G. & W. Nicol, 1802. 2 parts, 4° (295 x 235mm). Engraved plate by Basire in part 1 (some browning in text of part 1). Original blue wrappers, "1802" and "1" & "2" inked on spines, UNOPENED (spine of part 1 worn)." /> YOUNG, Thomas (1773-1829). "On the Theory of Light and Colours [An Account of some Cases of the Production of Colours, not hitherto described]", in <I>Philosophical Transactions</I> 92, pp.12-48 & 387-97. London: W. Bulmer for G. & W. Nicol, 1802. 2 parts, 4° (295 x 235mm). Engraved plate by Basire in part 1 (some browning in text of part 1). Original blue wrappers, "1802" and "1" & "2" inked on spines, UNOPENED (spine of part 1 worn). | Christie's