KEY AND INDEX 



Rolls, Charles R., his remarkable 

 fli 



Royal Academy of Sciences, at 



ight across the English Chan- Paris, 2, 202; at Berlin, ibid. 

 el, 7,_294. Royal Institute, founded 1801, 



4, 46; Humphry Davy as- 



Roman Period, Science of the, 

 Chapter X, 1, 253. 



Roofs, different types of, 9, 153. 



Rosel, Prof., of the University 

 of Bern, has demonstrated the 

 presence of microscopic dia- 

 monds in steel, 9, 329. 



Rosellini extended the knowl- 

 edge of the phonetic value of 

 inscriptions on the Rosetta 

 Stone, 1, 27. 



Rosetta Stone, its hieroglyphics 

 deciphered by Dr. Thomas 

 Young, 1, 27; the, 4, 287; 

 biography of, 4, 288; de- 

 cipherment of, 4, 289, 290; in 

 British Museum, 5, 8. 



Rosicrucians, 2, 136. 



Ross, Sir James, located the 

 northern magnetic pole, 7,13. 



Ross, Louis, his automobile 

 record at Ormonde, 7, 165. 



Rotary engine, principle of, 6, 

 119; James Watt's invention 

 of, 6, 119; Joshua Rout- 

 ledge's, 6. 120; of Rev. 

 Patrick Bell, 6, 121; of Lord 

 Armstrong, 6, 120; of Messrs. 

 Fielding and Platt, 6, 122; of 

 Mr. Hoffman of Buffalo, 6, 

 123; estimated speed of loco- 

 motive using Hoffman engine, 

 6, 123; see also "Steam- 

 Engine." 



Routledge, Joshua, design of his 

 rotary engine described, 6, 

 120. 



Rotary motion, in steam-engine, 

 first attempts at, by Watt, 6, 

 99100; crank and connect- 

 ing rod patented by Picard, 6, 

 100; Watt invents sun-and- 

 planet gearing, 6, 100; pos- 

 sibilities of, not realized at 

 first, 6, loo-no. 



Rowboat, the oar a modified 

 form of lever, 6, 58; ancient 

 ships chiefly propelled by 

 oars, 7, 57. 



Roux, Dr., his paper on anti- 

 toxine, 4, 242. 



.46; 



sumed chair of chemical phil- 

 osophy of, 4, 46. 



Royal Institution and the Low- 

 Temperature Researches, The, 

 Chapter III, 5, 29. 



Royal Institution of Great Brit- 

 ain, foundation and founder, 



6, 29, 30; methods and results 

 at, 5, 33-3 8 - 



Royal Society of London for 

 Improving Natural Knowl- 

 edge, The, Chapter II, 5, 14. 



Royal Society of London, the, its 

 origin, 2, 201; 6, 14-28; 

 visitors to, 6, 15; the lecture- 

 room of, 6, 17; comparison 

 between, and the Royal Acad- 

 emy of Science of Berlin, 6, 

 18; library and reading- 

 rooms of, 6, 19; busts of dis- 

 tinguished members of, 6, 20; 

 priceless relics in, 6, 21, 22. 



Royal Swedish Academy, 2, 

 202. 



Rozier, Pilatre de, the first man 

 to make an ascent in a balloon, 



7, 235; the first victim of 

 ballooning, 7, 241. 



Rubens, Peter Paul, was in- 

 terested in the reproduction of 

 paintings through copper en- 

 graving, 8, 194- 



Ruby and its allies, the, 9, 319. 



Riicker, Arthur William, per- 

 manent secretary, Royal So- 

 ciety of London, 6, 17. 



Ruhmkorff , the electrical coil of, 

 6, 199. 



Rumford, Count, and the vibra- 

 tory theory of heat, 3, 208; 

 his experiments to determine 

 the nature of heat, 3, 209; 

 determines that heat is a 

 form of motion, 3, 215, 

 showed that labor may be 

 transformed into heat, 3. 255; 

 founder of the Royal In- 

 stitution of Great Britain, 6, 

 30; challenged the doctrine 

 of imponderable fluids as ap- 



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