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, 435 



' 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:^^5- 

 sage of light-waves in, 313 ; circular 

 polarisation in quartz, 314 



Currents from an electric battery, 262 ; 

 Humboldl 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 



Dal ton, life of, 371 ; on law of multiple 

 proportions, 373 ; atomic theory, 374 



Dark ages, science of, 39 et seg. 



Larwin, 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 electro- 

 lysis, 364 ; discovers potassium and 

 sodium, 365 ; his safety lamp, 363 ; on 

 organic chemistry, 378 ; on sun-pictures, 

 317 ; Sir H. melts ice by friction, 333 ; 

 his kindness to Faraday, 348 



De Dominis on the rainbow, 164 



Delisle's method of measuring transit of 

 Venus, 266 



Deltas, growth of, 12 



Democritus on the Milky Way, 15 



Denudation, Hutton on, 220 



Descartes on light, 106, 164 ; on the value 

 of doubt, 105 



Development of animals, Lamarck on, 

 391 ; Von Baer on, 402 



Diagram showing how distances can be 

 measured on the sun's face, 159 



Diagrams of bent and broken rocks, 217, 

 218 



Diameter of the sun, 161 



Diamond, nature of, proved by Lavoisier, 

 238 



Djafer, or Geber, Arabian alchemist, 43 



Dia^cious plants explained by Csesalpinus, 

 72 



Dicotyledons term explained, 145 



Differential calculus, by Leibnitz, 148 



Disc, Newton's rotating, 168 



Dispersion of light discovered by Newton, 

 164 ; in different kinds of glass, 169 



Distillation known to Geber, 43, 370 



Distribution of animals, Buffon on, 206 ; of 

 plants, Humboldt on, 385 



Dogmatism of the sixteenth century, 67. 

 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 wild 

 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 



