— and exponential theorems, new mode of obtaining, T. Strong, xlviii, 36.
Logwood, on hæmatoxylin the coloring principle of, xliv, 357.
Long's expedition to the Rocky Mountains, vi, 374.
Long, G. W., description of a frame bridge, xviii, 123.f
—, on the origin of springs and fountains, xvii, 336.
—, a parasite tree, xxvi, 106.f
Long lake and Mud lake, Vt., on the eruption of, S. E. Dwight, xi, 39.f
Longevity of trees, xxii, 379.
— of the yew tree, xxix, 353.
— — —, Bowman, xxxi, 358.