SMYTH, CHARLES PIAZZI. Madeira Spectroscopic being a Revision of 21 Places in the Red Half of the Solar Visible Spectrum. 19 lithographed plates, the last in color; mounted Woodburytype on title after drawing of Funchal Bay by the author. first edition * Micrometrical Measures of Gaseous Spectra Under High Dispersion. 29 double-page plates; 2 folding plates (the first torn and loose). first separate edition, reprinted from Transactions of the Royal Society of Edinburgh. Together, 2 volumes. 4to, original cloth, both bindings somewhat soiled, first spine darkened; contents of the first volume foxed, second clean. Edinburgh, 1882; 1886