—, chimneys of, containing cadmia, xii, 168.
—, —, containing titanium crystals, xii, 189.
Furrows in rocks, see [Scratches.]
Fur trade and fur-bearing animals, xxv, 311.
Fusibility of mixture of carbonate of potash and carbonate of soda, xix, 379.
Fusible metal, xxi, 371.
Fusion of charcoal and anthracite, B. Silliman, v, 108, 361; vi, 341, 349, 378; viii, 147; x, 109, 119.
— —, J. Griscom, v, 364.
— —, R. Hare, viii, 288; x, 111, 118; xxxviii, 190.
— —, L. Vanuxem, viii, 292; x, 102.