420 SCIENTIFIC RECORD FOR 1884. 



No. of paragraph. 

 Electricity — Continued. 



Observations of 330,334,341 



Theories of 332,340 



Storm 343 



Epidemics, distribution of 38 



Equatorial region, study of 43, 44 



Ericsson, J. : 



Improved solar motor 176 



Results wi th solar pyrometer 177 



Erk, F., temperature at Munich 157 



Eruptions, volcanic and resulting meteorology 395, 396, 397 



Espy, Prof. J. P. : 



Study of cloud movement 229 



Cause of wind-gusts 270 



Gusts preceding thunder-storms 298 



Sketch of his labors 206 



Structure of thunder-storms 305 



Evaporation 199.200 



Everett, Prof. J. D., text-book of physics 72 



Faye, sun-spot period in position of pier 415 



Ferrari, C. : 



Italian thunder-storms 291 



Cause of thunder-s*^orms 301 



Climate and harvests in Italy 426 



Ferrel, Prof. William : 



Author of a general treatise on meteorology 69 



Theory of wet and dry bulb thermometers 127 



Poleward tendency of storms 286 



Hypsometric formula 418 



Festing, Colonel, aqueous absorption bands 374 



Finemann, C. G., studies on tornadoes 306 



Finley, Lieut. J. P. : 



Tornado predictions 3 



Charts of storm frequency 283 



Fischer, Prof. A., metallic thermometers 136 



Fitzgerald, Prof. G.F., flotation of silk fibers 212 



Fog, measurement of density of 153 



Fogbow, observed on Ben Nevis 379 



Forster, Prof. William : 



Errors of thermometers 114 



Sun-spot period in position of pier 413 



Frankal, Dr. A., animal growth in rarefied air 430 



Friction, effect on barometric gradient 280 



Fritz, Prof, H. : 



The whisper wind of the Rhine 240 



Low alti tude of aurora 360 



Periodicity of aurora , 361 



Frolich, Dr. O. : 



Atmospheric absorption 180 



Reply to criticisms 183 



Frost-work, method of measuring 148 



Fuess, R., anemograph 134 



Gay, twilights and eruptions of previous years 397 



Gelcich, E., Jouva's rules for hurricane predictioiis 99 



