456 



INDEX. 



COLUMBUS 



Columbus on circulation of the blood, in 



Combustion, Hooke on, 130 ; Mayow on, 

 132 ; Stahl's mistaken theory of, 135 ; 

 cause of proved by Lavoisier, 238 



Comet, Halley predicts return of, 163 



Comets, Newton on orbits of, 155 ; re- 

 turning, 291 ; and meteors, 297 



Commutator of the telegraph, 360 



Comparative anatomy, rise of, 197 ; Hun- 

 ter's collection illustrating, 199 ; Haller 

 on, 197 ; Cuvier on, 395-98 



Compass, figure of first mariner's, 54 



Compound flowers, 145 



Concluding remarks, 433 



Condenser, Watt's separate, 248-50 



Conservation of energy, 339 



Contraction of the muscles, 197 



Cook's voyage to observe transit of Venus, 

 162 



Cooke patents electric telegraph, 357 



Copernican theory, 65 ; proofs of the truth 

 of, 91 



Copernicus, life and work of, 65 



Cordova, medical school of, 40 



Corpuscular theory of light, 174, 303 



Correlation of the physical forces, 43s 



' Cosmos ' of Humboldt, 386 



Crabtree sees transit of Venus, 158 



Crookes discovers thallium, 323 



Crown of cups, Volta's, 262 



Crown-glass, dispersion of light in, 169 



Crystals, double refraction in, 180 ; r-^. 

 sage of light-waves in, 313 ; circular 

 polarisation in quartz, 314 



Currents from an electric battery, 262 ; 

 Humboldt on ocean, 385-86 



Cuvier, history of, 389-95 ; his museum, 

 391 ; on creation of animals, 394 ; his 

 discussion with St.-Hilaire, 395-397 : on 

 comparative anatomy, 395 ; on classifica- 

 tion and structure of animals, 396 ; on 

 fossil animals of Paris, 397 ; his ' Osse- 

 mens Fossiles,' 399 ; death of, 400 



Cycloidal pendulums, 175 



DABURON, Ampere's visit to, 344 

 Daguerre fixes sun-pictures, 317 



Dalton, life of, 371 ; on law of multiple 

 proportions, 373 ; atomic theory, 374 



Dark ages, science of, 39 et seq. 



Darwin, his history, 425 ; on origin of 

 species, 426 ; his theory explained, 427- 

 431 ; on causes of natural selection, 429 



Daubenton's anatomical work, 205 



Davy, Sir H., his history, 362 ; his experi- 



EARTHQUAKES 

 ments on nitrous oxide, 363 ; on elec: 

 lysis, 364 ; discovers potassium 

 sodium, 365 ; his safety lamp, 363 

 organic chemistry, 378 ; on sun-pictu: 

 317 : Sir H. melts ice by friction, 33; 

 his kindness to Faraday, 348 

 De Dominis on the rainbow, 164 

 Delisle's method of measuring transit 



Venus, 266 

 Deltas, growth of, 12 

 Democritus on the Milky Way, 15 

 Denudation, Hutton on, 220 

 Descartes on light, 106, 164 ; on the val 



of doubt, 105 

 Development of animals, Lamarck 



391 ; Von Baer on, 402 

 Diagram showing how distances can 1 



measured on the sun's face, 159 

 Diagrams of bent and broken rocks, 21 



218 

 Diameter of the sun, 161 

 Diamond, nature of, proved by Lavoisie 



238 

 Djafer, or Geber, Arabian alchemist, 43 

 Diaecious plants explained by Csesalpinu 



72 

 Dicotyledons term explained, 145 

 Differential calculus, by Leibnitz, 148 

 Disc, Newton's rotating, 168 

 Dispersion of light discovered by Newtoi 



164 ; in different kinds of glass, 169 

 Distillation known to Geber, 43, 370 

 Distribution of animals, Buffon on, 206 ; 



plants, Humboldt on, 385 

 Dogmatism of the sixteenth century, t 



81, 83 

 Dollinger, anatomist, 401 

 Dollond, Mr., makes achromatic telescope, 



169 

 Double refraction, 179, 180 

 Doubt, Descartes on the value of, 105 

 Drebbel makes alcohol thermometer, 120 

 Ducts of plants, 140 

 Du Faye on electricity, 254 

 Dynamical theory of heat, 335 



EARL'S COURT, Hunter kept wiU 

 animals at, 199 

 Earth declared by Aristotle to be a globe, 

 16 ; circumference of measured, 28 ; 

 Picart measures the size of the, 150 ; 

 Newton on shape of the, 154 ; measure- 

 ment of density of the, 277 

 Earth-light on the moon, 89 

 Earthquakes, Pythagoras on, 12 ; Strabo 



i 



