Proportions, definite, in Chemistry, D. Olmsted, xii, 1.
Prospect Hill, East Haven, Ct., scenery of, vii, 3.
Proteus of the North American Lakes, S. L. Mitchill, iv, 181; vii, 68.f
—, D. H. Barnes, xi, 285.
Protococcus kermesinus, analogous to red particles in blood, xxxvi, 206.
Prout, W., analysis of starch sugar, xxxv, 299.
Providence Franklin Society, xviii, 195.
— tornado, R. Hare, xliii, 137.
— —, W. C. Redfield, xliii, 263.f
Prunnerite, new mineral species, xx, 197.