Hemlock, reaction of sulphuric with the essential oil of, xxxvii, 246.
Hemming's safety tube, J. W. Webster, xxxvii, 104.
Hemorrhage, remedy for, v, 409.
Hemp, Manilla, account of, xli, 200.f
Hemprich and Ehrenberg, notice of journey by, in Northern Africa, vii, 195.
Henry, J., electro-dynamic induction, xxxviii, 209f; xli, 117.f
—, large, xix, 408.f
—, electro-magnetic experiments, by, xxii, 403.
—, — apparatus, application of galvanic multiplier to, xix, 400.f
—, — —, remarks in confirmation of, J. W. Webster and R. Hare, xx, 143.