— tufa in Massachusetts, viii, 34.
— —, in New York, vii, 252.
— —, in Western States, vii, 47.
Calcium, atomic weight of, xlvii, 189.
—, obtained by R. Hare, xxxvii, 267; xxxviii, 115, 181, 189; xxxix, 362; xl, 293.f
Calculating machine, Constants, Babbage's, xxviii, 64.
Calculi, chemical examination of, by J. F. Dana, iv, 149.
—, urinary, composition of, xvii, 190.
—, gouty, xlvii, 197.
—, in the ovary of a turtle, J. E. Muse, xxvii, 163.