Hydroxanthic acid, vii, 376.
Hygrometer, Daniell's, remarks on, E. Loomis, xlvii, 19; xlix, 277.
—, portable, A. A. Hayes, xvii, 351.f
Hygrometric Register at Western Reserve College, E. Loomis, Sept.-Nov. 1838, xxxvi, 166;
–1838-1840, xli, 315;
–1841-44 xlix, 271.
— —, at Hudson, Ohio, compared with those at Greenwich, E. Loomis, xlix, 276.
— observations, mean of, at Malvern, in Worcestershire, xxxviii, 102.
— —, at Matanzas, A. Mallory, xxxi, 287.
— —, at New Orleans, Barton, xxxi, 400.