—, use of sulphate of copper and other saline materials in making, M. Kuhlmann, xx, 269.
Breast wheels, A. B. Quinby, xi, 333.
Breathing, voluntary, v, 203.
Breccia, cemented by hematitic iron, viii, 18.
—, quartzose, in western Massachusetts, viii, 18.
Breislakite, xi, 250.
Breithaupt's specific gravities of minerals, table of, xxxi, 268.
Bremicker's comet, xl, 207.
Brevicite, a new mineral species, xxx, 178.
Brewster, D., on the distribution of the coloring matter and the optical properties of the Brazilian topaz, vii, 364.