518 INDEX. 



Paob 



Machines, classification of the functions of 314 



Magnet (electro-) with long coil, adapted to telegraph 42 



Magnet (large electro-) made for Tale College 60 



Magnetic attraction and repulsion, reciprocating motion produced 



Magnetic intensity at Albany, New York, observations on. — 59 



Magnetic polarization of light 343 



Magnetic power in soft iron, developed with a small galvanic 



element 37 



Magnetism and Electricity, contributions to 80, 92, 108, 149, 200 



Magnetism electrical induction from 74, 78, 114 



Magnetism of the earth disturbed by aurora borealis 58 



Magnetism, production of currents and sparks of electricity from _ 73 



Magnetizing of needles by lightning many miles distant 203 



Magneto-electricity, discovery of, by Faraday 74, 78, 114 



Magneto-electric machine, effect of wire around armature 117 



Magneto-electric machine, improvement in, by Prof. Ettinghausen 144 



Magneto-electric machine, induction currents of several orders from 144 



Masson, experiment by, on the influence of a spiral conductor 108 



Masson's suggestion as to induction shocks from electrical fish 160 



Matter, four states of, assumed 258 



Matter, the atomic constitution of 255, 298 



Matteucei, experiments by, on phosphorescence 205 



Mechanical arts, on the improvement of 306 



Mechanics' Institute of Washington, address to 306 



Memory to be early cultivated and stored 335 



Mercury transmitted by capillarity through lead 146 



Metallic roofs, protection of, from lightning 231 



Metals, capillarity of, observed 146, 228 



Metals, difi'usion of, in alloys 229 



Metals weakened by hammering 355 



Metals weakened interiorly by stretching 354 



Meteorology, etc., application of thermo-galvanometer to 215 



Mistletoe steamer used in observations on sound 434, 437, 458, 458 



Molecular cohesion, observations on 352 



Moll, Prof. G., paper by, on electro-magnetism 49 



Monhegan Island, observations at, on sound 498 



Moon, heat from, uncertainty of 284 



Motor from galvanic currents in conductors 189 



Motors (natural) origin and classification of 220, 221, 311 



Myrtle, steam-tender, used in observations on sound 426 



Nails, iron, peculiar action of fire on 224 



New Haven, experiments near, on sound and fog-signals, in 1865 — 378 



Newton, Sir Isaac, ring magnet worn by 48 



Newton's theory of light burdened with supplementary hypotheses 299 



Newton's theory of the constitution of matter 298 



New York, Topographical sketch of 8 



