— experiment by galvanic light, B. Silliman, Jr. and W. H. Goode, xliii, 185.
— pictures, mode of fixing, engraving, and printing from, Dr. Berres, xxxix, 385.
—, see farther under [Photography.]
Dahlias, notes concerning, xxiv, 208.
Daltonism, remarks on, Prof. Wartmann, xlii, 162.
Dalyell, J. G., on the propagation of Scottish Zoophytes, xxviii, 77.
Dams, vibrating, account of, E. Loomis, xlv, 363.f
—, time of vibration calculated from the dimensions of, xlv, 373.
Damascus cutlery, v, 182.
Dana, J. D., description of the Argulus Catostomi, xxxi, 297.f