— paper, mode of imitating, xix, 189.
Silvering copper, xxiii, 386.
— glass, Drayton's method, xlix, 198.
— iron, xxx, 169.
Simond, L., notice of, xxiii, 371.
Sines and cosines of the sum and difference of two arcs, formulæ for, T. Strong, i, 424.f
—, rational expression for, D. Gould, xxii, 392.
Singapore, climate and productions of, J. S. Travelli, xliv, 151.
Siren, notice of genus and species, D. H. Barnes, xi, 281.
Sismondine, analysis and description of, A. Delesse, xlvii, 217.