—, improvement in the Daguerrotype process, xli, 352.
Barnes, D. H., geological section of the Canaan Mt., N. Y., v, 8.
—, on some doubtful reptiles of North America, xiii, 66.
—, notice respecting magnetic polarity, xiii, 70.
—, —, reply to, xiv, 121.
—, on the genera Unio and Alasmodonta, vi, 167,f 258.f
—, new species of Chiton, vii, 69.f
[Barometer,] construction of, in America, J. Green, xxvii, 292.
—, new construction of, J. L. Riddell, xxvii, 223.f