INDEX. 555 



_ -^ . , Page. 



Kegnault, experiments by, on miasma 172 



Regnault, table by, of the elastic force of aqueous vapor at differ- 

 ent temperatures 217 



Reid, theory of hurricanes by. ong 



Repulsion of electricity carrying it to the surface of a body_-.322, 323, 342 



Repulsive energy exhibited by electric spark and by lightning 337, 338 



Resinous or negative electricity, how produced 317 



Resonance of rooms dependent on various conditions 412 413 



Resuscitation of frozen fish possible 209 



Reverberation of sound due to repeated and commingled echoes. _. 411 



Ribbon lightning-rods objectionable 398 



Rocky mountain range, effect <»f, in perturbing the trade-winds ___ 84 



Rocky mountain region, sterility of 68 70 



Rogers, Mr. Henry J., account by, of elevated lighting-rod struck 



by lightning 395, 397 



Rumford, Count, experiment by, on the heat generated by friction 135 



Rumford's photometer employed in testing illuminating oils 485 



Russell, Mr. Robert, investigations by, in meteorology of North 



America 293 



Russell, Mr. Robert, modification of rain-gage by 2 



Russell, Mr. Robert, views of, as to perturbations of the trade-winds 84 



Russia, meteorological system of . 450 



Sabine, Prof. E., observations by, on terrestrial magnetism, referred to 349 



Salt, effect of, when sprinkled on ice 203 



Salt in water, elastic force of vapor reduced by 221 



Saussure, estimate by, of maximum proportion of carbonic acid, 



favorable to plant life 164 



Saussure, experiment by, for showing electricity from the earth's 



induction 351 



Saussure, experiment by, on accumulation of solar heat in enclosed 



box 45 



Saussure, observations by, of water vesicles in the air 245, 24G 



Saving by the Government in the use of lard-oil for light-houses.. 495 



Saxton, Mr. Joseph, experiments by, on expansion of marble by 



water 243 



Schaeffer, Prof. G. C, microscopic examination by, of atmospheric 



vegetable dust 256 



Schseffer, Prof. G. C, sulphuric acid barometer proposed by 423 



Schonbein, discovery by, of ozone as a changed form of oxygen — 167, 344 



Schubler, table by, of heat absorption by various earths 192 



Science the fore runner of improvements in art 8 



Scientific investigation, mental qualification required for 515 



Scientific investigation, method of prosecuting 517, 518 



Scientific research essential to further improvement in agriculture.lO, 11, 86 



Scientific research, practical value of 87 



Scientific societies, the importance of 469 



