—, monochromatic, of D. Brewster, vii, 363.
—, oil gas, xxii, 387.
—, portable gas, iii, 371.
—, Rumford, xix, 40.
—, voltaic, J. Cutbush, ii, 332.
— black, analysis of, xi, 387.
— glasses, to prevent the cracking of, xxi, 165.
Land and water, distribution of, xiv, 375.
Land surveys in the U. States, present mode of conducting, xix, 131.
Languages, F. Adelung's work on, iii, 376.