338 BIOGRAPHICAL INDEX 



PAGE 



PILCHEB, PERCY S. (1866-1899) 286 



PLATO (circa 427-347 B.C.) 166 



PLAYFAIR, LORD (1818-1898) 14 



PLINY, THE ELDER (circa 23-79) 276 



PLUTARCH (circa 46-120) Ill 



POINCARE, HENRI (1854-1912) 170 



POISSON, S. D. (1781-1840) - 237 



POPE, ALEX. (1688-1744)- - - 20 



PRESTWICH, SIR JOSEPH (1812-1896) 81, 114 



PRIESTLEY, J. (1733-1804) - 244, 246, 251 



PTOLEMY, CLAUDIUS (Ilnd Century A.D.) - - - 127, 143 

 PYTHAGORAS (566-470 B.C.) - - - -69,127,143 



RAMSAY, SIR ANDREW (1814-1891) - - - - - 78 

 RAMSAY, SIR WILLIAM (1852- . . .) - - 60, 61, 62, 308 



RALEIGH, SIR WALTER (1552-1618) - - 186 



RAYLEIGH, LORD (1842- . . .) 60, 62 



REAUMUR, R. A. F. DE (1683-1757) - 69, 71, 73, 75, 119, 244 

 REED, WALTER (1857-1903) - - - 228 



REMSEN, IRA (1846- ...)-- 253 



RICHTER, J. P. F. (1763-1825)- - - 328 



RIGOLLOT, DR. - 114 



RONTGEN, C. W. (1856- . . .) - 236, 301, 303, 304, 305, 306, 309 

 ROSCOE, SIR HENRY (1833-1915) - ... 182, 247 

 Ross, SIR RONALD (1857- . . .) - - - 226, 227, 228, 233 

 ROUTH, E. J. (1831-1907) - - 291 



Roux, P. P. E. (1853- . . .) - - 8, 216, 235 



ROWLAND, H. A. (1848-1901) - - - 27 



RUMFORD, COUNT (1753-1814) - - - - - - 179 



RUSKIN, JOHN (1819-1900) - 92 



RUTHERFORD, SIR E. (1871- . . .) v - - - 306, 307 

 RYLE, RIGHT REV. BISHOP (1856- . . .) - - - - 23 



SACKEN, BARON OSTEN (1828-1906) 120 



SAGE, C. LE (1724- ...) - - - - . - 176 



SANTOS-DUMONT, A. (1873- . . .) 290 



SAUSSURE, N. T. DE (1767-1845) -. .- - - - 278 



SAVERY, T. (1650-1715) - - - - - - 2G1 



SCHAEBERLE, J. M. (1853- . . .) - - - 318 



SCHEELE, K. W. (1742-1786) 251 



SCHIRACH, A. G. (1724-1773) 71 



