INDEX 



weight of the ice-sheet over New 

 England, 150; his theory of the 

 Gulf Stream, 180, 181, 182; his 

 theory of solar heat, 439. 



Crookes, William, his ultra-gaseous 

 theory of matter, 247; advocates 

 the Proutian theory of the com- 

 pound nature of the so-called ele- 

 ments, 287. 



Cuvier, Georges, his doctrine of the 

 correlation of parts, 36 ; his study 

 and investigation of fossil bones, 

 which lead to the establishment of 

 vertebrate paleontology, 91-94, 96 ; 

 his belief in catastrophism, 98, 

 131 ; his disbelief in the authen- 

 ticity of human fossils, 111; his 

 investigation of strata near Paris, 

 138; his theory of special creation 

 and fixity of species, 297, 299-302 ; 

 his classification of the animal 

 kingdom, 321 ; his law of co-ordi- 

 nation, 322; opposes Gall's phre- 

 nological system, 400. 



Cyclone, description of, 186. 



DAGUEIIRE, Louis JACQUKS MANDE, 

 his perfection of photography, 284. 



Dalton, John, his solution of the 

 problem of evaporation and pre- 

 cipitation, 168, 169, 171, 172, 252, 

 253 ; his explanation of the trade- 

 winds, 178, 182; his conception of 

 the chemical atom and his atomic 

 theory, 253-255, 259, 260, 262. 



Darwin, Charles Robert, and his 

 Origin of Species, 105-108, 302- 

 810; cited by Lyell to prove a 

 change of level in continental 

 areas, 126 ; his theory of latent 

 heat, 171 ; his construction and 

 establishment of the theory of the 

 origin of species by natural selec- 

 tion, 302-317. 



Darwin, Erasmus, how he accounted 

 for the aurora, ]63; his prophetic 

 conception of the transmutation of 

 species, 290, 291, 296. 



Darwin, Professor G. H., his determi- 

 nations as to the comparative mo- 

 tion of the earth and moon, 51, 52. 



Davy, Humphry, his experiments in 

 photography, 2 ; endorses Thomp- 



son's theory of heat, 27 ; experi- 

 ments on respiration, 40; his sug- 

 gestion to account for the molten 

 condition of the earth, 125 ; dis- 

 covers that the cause of chemical 

 and of electrical attraction are 

 identical, 206; proves the trans- 

 formation of labor into heat, 210 ; 

 melts ice by friction, 225; his the- 

 ory of the properties of particles of 

 matter (or atoms), 241, 242; non- 

 committal as to Dalton's atomic 

 theory, 259 ; his remarkable dis- 

 coveries which led to the theory of 

 the binary composition of chemical 

 compounds, 262-265 ; originates the 

 method of medication by inhala- 

 tion, 366. 



Dawes, Rev. W. R., his discovery of 

 a new ring around Saturn, 49, 50. 



Dawson, Sir William, his study of the 

 Laurentian system of Canada, 139. 



Deluc, Guillaume Antoine, his theory 

 of evaporation, 168, 170. 



Desmoulins, Louis Antoine, his psy- 

 chological researches, 400. 



Devaine, a French physician, discov- 

 ers the cause of the infectious dis- 

 ease anthrax, 380, 381. 



Deville, Sainte Claire, his investiga- 

 tion of the chemical process known 

 as dissociation, 273. 



Dew, the problem of its formation 

 solved, 167-172. 



Digestion, investigation of its proc- 

 esses, 39, 347-352. 



Diphtheria, the serum treatment for, 

 392, 393. 



Dissociation of molecules and atoms, 

 investigated by Deville, 273 ; an 

 unsolved problem, 447, 448. 



Donati, Giovanni Battista, spectro- 

 scopic researches of, 70. 



Donders,FransCornelis, makes the first 

 attempt to time nervous action, 413. 



Dove, Ileinrich Wilhelm, his study of 

 the winds, 182, 183. 



Draper, Henry, successfully photo- 

 graphs a nebula, 79. 



Draper, John William, his pioneer 

 work in celestial photography, 76 ; 

 his application of photography to 

 spectrum analysis, 285. 



463 



