203 



ttggi, Hot necessary for pro- 



during life ... 21 



AgMiiz on ... 21 



" not chickens ... 87 



Egypt, rain becoming more frt- 



.jiifiit in ... 114 



" oultivation of the palm in 114 



Electricity. Dr. Tho. Thomson 

 on .. 85 



Electricity, Parker, 81r "Win. 

 Thornton, Tyndall, OroTe, 

 and De la Hire on 85, 86 



Electricity confounded with 

 magnetism ... 84 



Electricity not a force, only 

 combustion ... 87 



Electricity caused by magne- 

 tism ... 87 



Electricity, all light in ...88 



lightning is ... 89 



Emission theory of light, Sir 

 Isaac Newton's ... 66 



Emetic, efficacy of an, in sickness 191 



Encke's comet 174, 175 



Energy, Professors Thomson 

 andTaiton ... 69 



English navvies, the work they 

 do ... 137 



Equator, calms of th*, explained 129 



Esquimaux, Sir John BOBS on 

 the appetite of ... 137 



Evaporation, a chemical action.. 110 

 " induced by cold as 



well as by heat... 110 



Evolution, doctrine of .:. 27 



Experiments, laboratory, doubt- 

 ful helps to science ... 53 



Experiments, Nature's, to be 

 studied ... 59 



F. 



Faith, essential in religion ... 130 

 Faraday, Michael, on magnetism 91 

 on magnetic 



eurves ... 99 

 born too soon 92 

 led astray by 



his imagination regarding mag* 

 nttic curves . . . 130 



Faraday, Michael, how he led 



Maury astray ... 130 



Fevers how caused and cured ... 193 

 Fire mist ... 4 



Fireflies, light of ... 64 



Filings, iron, magnetic arch 



formed by ... 93 



Fir, not BO powerful as water.,. 107 



Fixh produced spontaneously ... 27 

 Fishes gills ustd for Altering 



their food, not for breathing.. Il4 

 Florida reefs, Agaasiz on the 



age 



149 



Food, Prof. Lyon Flajfair on 



" Liebig on ... 137 



Playfair's tables of 

 On mineral . . . 137 



" how transformed into 



blood ... 189 



Fogs, cause of 110, 111, ]_:} 



Forests, why they produce rain.. 114 

 Forms of water, Tyndall's .. 109 

 Fox, nu nning of the .. 30 



Fraier's magazine ort matter . . 4 

 Frost leaves . . 93 



" hoar, cause of !_'.'< 



Fumly, Bay of, North America, 



high tides in, cause of 101, 1C5 

 Fundy, Bay of, rise of two feet 



in three mile* . . . 166 



a. 



Gastric Juice, what it ... 138 



Germs, theory of ... 23 



' ' difference between atoms 



and ... 25 



where do they come from 25 

 must be born in some 



way ... 25 



Pasteur & Tyndall on 25, 26 



Geography of the sea, Maury 's.. 130 



Geysers and hot springs, cause of 54 



" Great, California, 54, 15j 



Ghoorkas, n>sh eating ... 137 



(Jills of a fish used for filtering 



food, not breathing ... 116 



Gibraltar, upper and under cur- 



rent at Straits of ... 165 



Glaciers, why chasms in Alpine, 



are blue ... 83 



" Tyndall on sdlar heat 

 the cause of ... 109 



God, magnetism not ... 198 



' perfection of ... 1'jy 



" the power of ... 199 



Gossamer thread, atomic action 



likened to a ... 59 



Graham, Prof . , on the Leomarto 



meteorite ... 180 



Granite, water in ... 108 



Gravitation, the law of, upset... 98 

 fails to account for 

 the repelling 

 power of the 

 un 174 



