Alcyonium, in green sand, Maryland, xvii, 288.
Alden, T., account of descents in a diving bell at Portsmouth, N. H., xxii, 325.
Alder, J., notice of, xxxvii, 168.
Aldini, on the preservation of firemen from the action of flame, by asbestus cloth and other means, xx, 96.f
Aldridge, on vegetable impregnation, xli, 62.
Alembic for distilling amalgam of gold, M. F. Maury, xxxiii, 66.f
Alexander, J. H., new form of barometer, xlv, 233.f
Algebraic series, J. Wallace, vii, 278.
— —, remarks on, viii, 131.
— —, reply by J. Wallace, ix, 98.