KEY AND INDEX 



retary of the Royal Society. He was associated 

 with Prof. William Ramsay in the discovery of 

 the new gas, argon, which forms approximately 

 i per cent of the atmosphere. 



Reamur, Rene, iv, 88. Born at La Rochelle, 

 France, Feb. 28, 1683; died at Bermondiere, 

 Maine, France, Oct. 18, 1757. French naturalist 

 and physicist. He discovered the method of 

 making the porcelain named for him and in- 

 vented the Reamur thermometer. In the scale 

 of this thermometer there are 80 degrees be- 

 tween the freezing-point and the boiling-point 

 of water. 



Rhazes, Arabian physician, ii, 24. Born at Raj, 

 Persia, about 850; died about 932. An Arabian 

 physician, philosopher and musician. He intro- 

 duced the use of mercurial ointment, sulphuric 

 and nitric acid, in therapeutics. He is credited 

 with being the first physician to describe small- 

 pox and measles accurately. 



Roentgen, Professor Wilhelm Conrad, iii, 248. 

 Born at Leinnep, Prussia, March 27, 1845. Ger- 

 man physicist. He has made several important 

 discoveries, but the importance of these is com- 

 pletely overshadowed by his discovery, in 1896, 

 of the Roentgen rays, or X-rays. For this dis- 

 covery he was awarded the Nobel prize in 1901. 



Rouge, Olivier Charles de, i, 27. Born at 

 Paris, April n, 1811 ; died at Chateau Bois-Dau- 

 phin, Dec. 31, 1872. Celebrated French Egypt- 

 ologist. Remembered particularly for his dis- 

 covery of the prototypes of the Semitic alphabet 

 in the early Egyptian hieratic. 



Rumford, Count, iii, 2o8;v,3O. Born at Woburn, 

 Mass., March 26, 1753; died at Auteuil, near 



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