KEY AND INDEX 



Langley, S. P., vii, 275. Born at Roxbury, 

 Boston, Mass., Aug. 22, 1834; died at Aiken, 

 S.C., Feb. 27, 1906. American astronomer. In 

 1887 was appointed secretary of the Smithso- 

 nian Institution. Became interested in the prob- 

 lem of aerial flight, and invented the first 

 heavier-than-air machine of any considerable 

 size which could fly by means of self-contained 

 power. 



Laplace, Marquis Pierre Simon de, iii, 32. 

 Born at Beaumont-en-Auge, Calvados, France, 

 March 28, 1749; died at Paris, March 5, 1827. 

 Celebrated French astronomer and mathemati- 

 cian. He made important discoveries concern- 

 ing the inequality of the motions of Jupiter and 

 Saturn, of the moon, and the tides. lie devel- 

 oped the nebular hypothesis of cosmogony with 

 such thoroughness that "posterity will always 

 link it with his name." 



Lavoisier, Antoine Laurent, iv, 33. Born at 

 Paris, Aug. 16, 1743; died (guillotined) at Paris, 

 May 8, 1794. French chemist, the founder of 

 modern chemistry. He overthrew the "phlogis- 

 tic" chemistry of the Eighteenth Century. He 

 introduced a new chemical nomenclature which 

 has remained practically unchanged except in 

 the matter of additions, to the present time. 



Layard, Sir Henry Austen, viii, 103. Born at 

 Paris, March 5, 1817; died at London, July 5, 

 1894. English archaeologist. He is noted for his 

 archaeological discoveries about Nineveh, and 

 his decipherment of the cuneiform characters 

 on the Assyrian monuments. 



Lee, Rev. William, ix, 56. Born at Notting- 

 ham (date unknown); died at Paris about 1610. 



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