KEY AND INDEX 



measuring time to the very small fraction of a 

 second. Noted for his work in stellar photog- 

 raphy. 



Boerhaave, Hermann, iv, 182. Born near Ley- 

 den, 1668; died at Leyden, 1738. Dutch physi- 

 cian. Educated for the ministry. He began in 

 1690 to study medicine, in which he was largely 

 self-educated. Rose in the profession until he 

 became Professor of Medicine at Leyden (1709). 

 He devised a new system of medicine, which he 

 explained in two great works. Also an investi- 

 gator in botany and chemistry. His fame as a 

 physician was world-wide. 



Borelli, Giovanni Alphonse, ii, 188. Born near 

 Naples, 1608; died at Rome, 1679. Italian physi- 

 cian and mathematician. Founder of the iatro- 

 physical school. Educated in Florence, pro- 

 fessor in Pisa and Messina. Driven from latter 

 place for participation in political revolt, he 

 spent remaining years in Rome. Seems to have 

 been first to discover parabolic paths of comets. 

 Wrote book on animal motion, attempting to 

 apply principles of mechanisms to movements 

 of animals. 



Boscovich, Roger Joseph, iii, 293. Born at 

 Ragusa, Dalmatia, 1711; died at Milan, 1787. 

 Italian astronomer and mathematician. Joined 

 Jesuit order. Taught in Rome and afterward in 

 Paris. In 1758 advanced a molecular theory of 

 matter. Wrote on many subjects in physical 

 science, and was first to introduce Newton's 

 theories into Italy. Died insane. 



Bose, George Matthias, ii, 274. Born at Leip- 

 sic, 1710; died at Magdeburg, 1761. German 

 physicist and physician. Taught in Leipsic, and 



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