204 



IXDEX. 



Crystallization, coral a form of 147 

 a. form of mine- 

 ral life ... 11 



D. 



Darwin, Dr. on one primordial 



form 22 



Darwin's, Dr., theory of the 



origin of species overthrown... 15 

 Darwin, Dr., on mind ... 30 



on the power of 



wishing ... 28 



Darwin, Dr. Agassiz's argument 



with coral insects against ... 149 

 Darwin's, Dr., theories of coral 



insects _ 149 



Darwin, Dr., states the Coral 



Islands are sinking .. 150 



Darwin, Dr., quoted by Sir John 



Herschell 150 



Daylight, cause of \ 75 



Descartes on matter and motion 6 

 Davy, Sir Humphrey, on heat 



in ice ... 58 



Deep sea, the, temperature of... 168 

 ' animal life in ... 168 



' coldness of the, ac- 

 counted for ... 172 

 ' currents, Dr. Carpen- 

 ter's theory of .. 165 

 ' Dr. Wyville Thomp- 

 son on .. Ig9 



Dew, Chamber's Journal on ... 119 

 Baptista Porta nearly dis- 

 covered the true theory of 119 

 Aristotle on ... 120 



Muschenbrook delayed the 

 discovery of the true 

 theory of ... 120 



Dr. Wells discoverer of 



the accepted theory of... 121 

 produced similarly to 

 wa *er ... 123 



a calm and clear evening 

 essential for the forma- 

 _. . _ . *>n of ... 123 



-De la Rive, on two differing elec- 

 tricities . gg 

 Delusions, scientific, about mag- 

 netism 94 

 Deviation of ships' compasses, 



caused by a speaking trumpet 100 

 Deviation of ships' compasses, 



caused by steering apparatus, 101 

 Deviation of ships' compasses, 

 caused by a cargo of petroleum 99 



Deviation of ships' compasses, 



caused by iron cross trees ... 101 

 Diseases, doctors ignorant of the 



nature of ... 186 



Diseases, so-called incurable ... 186 

 should be the excep- 

 tion, as Sir J. Y. 

 Simpson said, ... 187 

 the cause of ... 190 



Distillation, the common theory 



of rain a process of ... 109 



Digestion, what is ...138 



extraordinary case of, 



by coral insects ... 148 

 Doctors, ignorant of disease ... 186 

 their ignorance not 



creditable to them 186 

 life action of the body 



unknown to ... 187 



their remedial know- 

 ledge gained ouly by 

 experience ... 187 



mysterious deaths by, 



ignored by the coroner 187 

 audacity of, in Ontario 187 

 one class of, petitioning 

 for a bill to persecute others... 187 

 Dogfish has no gills ...116 



Drainage, Sir John Herschell 



says, lessens the rainfall ... 114 

 Dumas, M., on origin of life ... 20 

 Dunsappie Loch, near Edinburgh, 



Scotland, obscure ice on ... 112 

 Dust and Disease, Tyndall on... 26 



E. 



Earth, the, heat generated by, 



falling into the sun 61 

 ' a magnetic battery 73 

 : no colour on ... 80 

 1 Prof Rogers on the 



central heat of 140, 153 

 thickness of the 



crust of ... 153 



Dr. Mayer on the 



internal fire of ... 154 

 " Drs. Tyndall, Thom- 

 son, and Herschell 

 on ... 154 



Earthquakes, Sir John Her- 

 schell on 155, 159 

 how prevented . . . 159 

 caused by chemi- 

 cal action ... 158 

 Ecliptic, plane of the, tides 

 caused by pressure on ...164 



