—, —, from a pond, v, 199.
—, —, from the water pipes in New York, xxi, 386.
—, —, nitrogen, Hoosic, N. York, xv, 234.
— lamps, portable, iii, 371.
— lights, iii, 170, 385.
— —, in England, iv, 373.
— —, at Glasgow, ii, 365; v, 141.f
— —, from cotton seed, D. Olmsted, viii, 294; ix, 170; x, 362.
— —, from peat, xxx, 189.
— —, from rosin, xxviii, 147.