INDEX 



485 



Renaissance, the problem of, 158 

 Renan, on curiosity, 5 



quotation from Dialogues Philoso- 



phiques, 212 

 Revelation, quotation from Book 



of, 48 

 Revolution of the earth, difficulty 



of conceiving, 103 

 Revolutionibus , De, Coppernicus' 



work, analysed, 164 

 Rheticus, disciple of Coppernicus, 



176 

 Richelieu, Cardinal, procures an 



extraordinary decree from the 



Parliament at Paris, 220 

 Riehl, on Bruno, 181 

 Rigel, its enormous size, 338 

 Roemer, discovers the speed of 



light, 284 

 Roman civilisation, exhaustion of, 



151 



Rome, its age of culture, 146 

 Rosenberger, account of Newton's 



discoveries, 257 

 Rosse, Lord, observations on spiral 



nebulae, 420 

 Rotation of the sun affirmed by 



Bruno, 181 



Royal Society, its origin, 247 

 Rubens, his picture in the Louvre, 



378 



Rumford, on nature of heat, 415 

 "Run-away" star, 1830 Groom- 

 bridge, 340 



stars, Newcomb's problem of, 

 446 



SAKYA-MUNI, mentioned, 155 

 Salons, French, patronised by men 



of science, 233 



Samarcand, Saracen capital, 154 

 Sanctorius, invention of a pendu- 

 lum clock, 244 



Saracens, their great libraries, 153 

 Saturn's rings, a picture of world 



formation, 408 



demonstrated by Huyghens, 245 

 Savery, invention of the heliometer, 



333 



Scepticism, need of scientific, 462 

 Schiaparelli, on Ptolemaic and 



Coppernican systems, 165 

 on theory of epicycles, 1 1 5 

 Schonberg, Cardinal, letter to Cop- 

 pernicus, 176 



Science, ancient, sparseness of dis- 

 covery in, 127 

 civilisation as the work of, 6 



Science, value of Greek, 146 



Sea, general level of, 121 



Sebastian d'Elcano, first circum- 

 navigation of the earth, 356 



See, T. J. J., Evolution of Stellar 

 Systems, 431 



Seeliger, on distribution of the 



stars, 393 

 on the infinity of the universe, 



447 

 Seleucus of Babylon, follower of 



Aristarchus, 114 

 Seneca, inscription in Epicurus' 



garden, 155 

 Sensation, Democritus' ideas on, 



134 

 Serapis, library in the temple of, 



152 



Sexagesimal system, 53 

 Shakespeare, appropriates Bruno's 



comedies, 178 



Shattered planet, theory of, 309 

 Shelley, his Hellas quoted, 428 

 Shooting-stars, degenerated comets, 



275 

 Simplicius, ideas of attraction, 124 



on grandeur of the stars, 148 

 Sirian traveller, viewing the earth, 



44 

 Sirius, distance from the earth, 



357 



its dark companion, 372 



size of, 337 



Sizzi, on Galileo's discoveries, 203 

 Skies, fascination of Mediterranean, 



99 

 Slavery, in ancient society, 50 



in England, lateness of, 14 

 Slaves, first men of science, 5 1 

 Socrates, contempt of astronomy, 



135 



idea of the earth, 5 



speech of Crito to, 458 

 Solar history, stages of, 424 

 Solar system, dimensions of the, 



305 



ideas on origin of, 402 

 motion of, 318 

 stability of, 446 



Solomon, believed in a flat earth, 5 

 Somerset, Lord, his early steam- 

 engine, 243 

 Somnium Astronomicum, a work 



by Kepler, 245 

 Sorbonne, Bruno's letter to the, 



179 



Space, demonstration that it is 

 practically empty, 242 



