—, daguerrotype pictures, mode of fixing, engraving and painting from, Berres, xxxix, 385.
—, copies of engravings by, xlii, 164.
Photographic delineation of nebulæ; at Rome, P. F. de Vico, xliv, 375.
— impression of the solar spectrum, J. W. Draper, xliv, 204.
— impressions obtained on silver, &c., without previous preparation, xliv, 159.
— preparation made with ferro-cyanate of potash, R. Hunt, xlii, 317.
— paper, mode of preparing, xxxvii, 171, 175, 361.
— —, action of the different rays of the spectrum on, producing colors, J. F. W. Herschel, xxxviii, 111.
— —, intensity of light in diffuse daylight measured by, A. Ure, xxxviii, 107.
— process, observations on, W. F. Channing, xliii, 73.