—, experiments on hydrochloric acid, xi, 393.
McConnell, B. R., notice of a revolving electro-magnetic instrument, xxxiii, 188.
McCord, J. S., meteorological observations at Montreal, 1836-40, xli, 330.
MacCulloch, J., essay on remittent and intermittent fevers, xviii, 338.
McGuire, W. W., on the prairies of Alabama, xxvi, 93;
–causes of, xxvi, 96.
Machine for cleaning grain invented, iv, 387.
— and its model, relation between, E. Sang, xxiv, 264.
Machines, examination of, maximum and minimum effect of, A. B. Quinby, xii, 346.
—, electrical, see [Electrical.]