KEY AND INDEX 



Educated Edinburgh, where for some years he 

 was assistant to Lord Playfair, Professor of 

 Chemistry. Afterward professor at Cambridge, 

 and at Royal Institution. Made special studies 

 of physiological action of light and liquefaction 

 of gases. 



Diodorus Siculus, i, 77. Born at Agyrium, 

 Sicily, latter half First Century B.C. Greek his- 

 torian. Set himself the task of writing a great 

 history of the world, in preparing for which he 

 traveled extensively in Europe and Asia, settling 

 finally in Rome, where he lived many years. 

 The preparation and writing of the work took 

 not less than thirty years. It covers about 1,100 

 years down to the Conquest of Gaul by Caesar. 



Diogenes Laertius, i, 121. Born at Laerte, 

 Cilicia, about beginning Third Century A.D. 

 Greek writer, whose principal work, "Lives of 

 the Philosophers," in ten books, has preserved 

 to us much knowledge of the history of Greek 

 philosophy, although it is largely biographical, 

 and gives little attention to the evolution of 

 philosophic thought. 



Dohrn, Dr. Anton, v, 121. Born at Stettin, 

 1840; died in 1908. German zoologist. Studied 

 under Haeckel at Jena. Made special study of 

 marine animals. 1870, founded the zoological 

 station at Naples, the first and still the most im- 

 portant in existence. 



Dove, Heinrich W., iii, 199. Born at Liegnitz, 

 1803; died at Berlin, 1879. German physicist and 

 meteorologist. Educated Breslau and Berlin. 

 Became professor University of Berlin, 1829. 

 Director of the Royal Observatory. Made spe- 



[88] 



