2 vols.
Technology - 19th-Century: Simms, Frederick W. A Treatise on the Principal Mathematical Instruments Employed in Surveying, Levelling and Astronomy. London, 1834. 8vo, orig. bds., cover label; somewhat worn, soiled & dampstained. Figures & illus. in text. * Prescott, George B. The Speaking Telephone, Talking Phonograph. New York, 1878. 8vo, orig. cloth; worn & frayed, back cover dampstained. Figures & illus. in text. Some internal wear.