552 - index- 



Page. 



Meteorology in its connection with agriculture 6, 33, 85, 212, 309 



Meteorology : Notes on rain-gages 1 



Meteorology of North America presenting conditions favorable for 



study 212 



Meteorology, the successful study of, in the United States 446, 448 



Miasma, precautions against, suggested _ 172, 173 



Miasma probably a vegetable, and not an animal organism 172 



Miasma supposed to be absorbed by vegetation 171 



Mineral matter diffused in the atmosphere 166 



Mineral oil, experiments for employing, in light-house illumination 476, 499 



Mineral oil inferior to lard-oil in illuminating power. . 509, 510 



Mineral oil substituted for lard-oil in light-houses, only because 



cheaper 510 



Mineral oil, the inflammability of, tested by flashing 502 



Minimum daily temperature about daybreak 182 



Mississippi valley, fertility of 68 



Mitchell, Prof. E., investigation of tornadoes by 292 



Moderator lamp employed in light-houses 496 



Moisture of air measured by the relative tension, not the amount 



of vapor 31, 234, 239 



Moncel, theory by, of zig-zag lightning 365 



Moon, supposed eflfect of, on the weather 253, 466 



Moral laws, the uniformity of, revealed by statistics 6 



Mordecai, Capt. A., meteorological observations by, at U. S. Arsenal 178 



Morse telegraph made operative by Dr. Gale's use of " intensity '' 



magnet — 427, 436 



Moscati, experiments by, in analyzing miasmatic air . 171 



Mountain chains, eflfect of, on winds and on climate 65, 66, 286 



National Academy of Sciences, presidential address before 536, 538 



Negative or resinous electricity from shellac, &e. 317 



Newton, atomic theory adopted by 91 



Newton's laws of force and motion, accepted as ultimate 90 



Newton's rule of explanation recommended 37 



New York, early attention to meteorology by the State 448 



Nitrate of potash, probable origin of 344 



Nitric acid produced in the air by thunder-storms 344 



North America a favorable field for the study of meteorology 212 



Northeast storms, theory of 305 



Ocean, circulating currents of 14 



Ocean, climate modified by 13 



Ocean currents ascribed to unequal heating and expansion 59, 60 



Ocean currents, efl"ect of, on land climate 285 



Ocean currents mainly due to friction of the trade winds 15, 60, 61 



Ocean currents of the Pacific and Atlantic illustrated 284 



Ocean-echo, hypothesis in explanation of 524, 525 



