576 



NATIONAL ACADEMY OF SCIENCES. 



Rogers, Pah-man, original member, formerly lecturer 

 in mechanics at the Franklin Institute and Professor 

 of Civil Engineering at the University of Pennsyl- 

 vania. 



*Rogers, Robert Empie, original member, chemist, 

 Professor of Chemistry at the University of Pennsyl- 

 vania, and of Chemistry and Toxicology at the Jeffer- 

 son Medical College, Philadelphia, Pa. 



Rogers, William 'Augustus, elected in 1885, astrono- 

 mer, Professor of Astronomy at Colby University, 

 Watervillc, Me., and an acknowledged authority on 

 micrometrical work. 



*Rogers, William Barton, original member, physicist, 

 founder and President of the Massachusetts Institute 

 of Technology, Boston, Mass. 



WILLIAM B. ROGERS, 



President of N. A S., 1878-1882. 



Rood, Ogden Nicholas, elected in 1865, physicist. Pro- 

 fessor of Physics at Columbia College and author of 

 *' Modern Chromatics." 



Rowland, Henry Augustus, elected in 1881, physicist, 

 Professor of Physics and director of the laboratory 

 of the Johns Hopkins University and inventor of the 

 large diffraction gratings known by his name. 



Rutherford, Lewis Morris, original member, astrono- 

 mer. His researches have been in celestrial photog- 

 raphy chiefly, and his pictures of the moon are the 

 best ever made ; also he devised a ruling engine for 

 gratings. 



*Saxton, Joseph, original member, mechanician, in- 

 ventor of numerous scientific instruments, and con- 

 structed the standard weighing apparatus at the Unit- 

 ed States Mint in Philadelphia, of which he was given 

 charge. 



Schott, Charles Anthony, elected in 1872, civil engi- 

 neer, assistant on the United States Coast Survey and 

 author of various observations published by the Smith- 

 sonian Institution. 



Scudder ; Samuel Hubbard, elected in 1877, naturalist, 

 long assistant librarian of Harvard University, and 

 since 1888 paleontologist to the Geological S'urvey. 

 On butterflies and fossil insects he stands first in the 

 country. 



Sellers, William, elected in 1873, mechanical engi- 

 neer, inventor of improved forms of tools and ma- 

 chines, for which he has received upward of seventy 

 patents. It is due to his influence that a uniform 

 system of screws, threads, and nuts was adopted 

 throughout the United States. 



*Siljiman, Benjamin, original member. Professor of 

 Chemistry and Natural History at Yale University, 

 and called by Edward Everett the " Nestor of Ameri- 

 can Science." 



*Silliman, Benjamin, Jr., original member, founder of 

 the Sheffield Scientific School in 1846 and professor 

 in various departments of Yale University until his 

 death, author of "First Principles of Chemistry" 

 and of " Principles of Physics." 



*Smith, John Lawrence, elected in 1872, chemist,, Pro- 

 fessor of Chemistry at the University of Virginia and 



an authority on mineralogy and meteorites, of which 

 his collection was one of the best in the world and 

 the finest in this country. 



Smith, Richmond Mayo, elected in 1890, political econ- 

 omist, Professor of Political Economy and Social Sci- 

 ence at Columbia College, New Yorli. 



Smith, Sidney Irving, elected in 1884, biologist, Pro- 

 fessor of Comparative Anatomy in the Sheffield Sci- 

 entific School, and also connected with United States 

 Fish Commission. 



*Stimpson, William, elected in 1868, naturalist, Sec- 

 retary of the Chicago Academy of Sciences and in- 

 vestigator of sea fauna under the auspices of the United 

 States Coast Survey, whose deep-sea dredging expe- 

 ditions he had command of. 



*Strong, Theodore, original member, mathematician, 

 Professor of Mathematics and Natural Philosophy at 

 Rutgers College, New Brunswick, N. J., and author 

 of various text-books on the higher mathematics. 



*Sullivant, William Starling, elected in 1872, botanist, 

 recognized as the most accomplished biologist that 

 this country has ever produced. 



*Torrey, John, original member, botanist, Professor of 

 Chemistry and Botany at Columbia College and 

 assayer in charge of the United States Assay Office in 

 New York city. 



*Totten, Josiah Gilbert, original member, civil engi- 

 neer, chief of corps of engineers with rank of briga- 

 dier-general and brevet rank of major-general, United 

 States army, and long a member of the United States 

 Lighthouse Board. 



Trowbridge, John, elected in 1878, physicist, Rum- 

 ford Professor of the Application of Science to the Use- 

 ful Arts and Director of the Jefferson Physical Labor- 

 atory at Harvard University, Cambridge, Mass. 



Trowbridge, William Petit, elected in 1872, engineer, 

 Professor of Engineering and in charge of that depart- 

 ment at the Columbia College School of Mines in New 

 York city. 



Trumbull, James Hammond, elected in 1872, philolo- 

 gist, formerly librarian of the Wadsworth Athenaeum 

 at Hartford, and is believed to be the only American 

 living able to read John Eliot's Indian Bible. 



*Tuckerman, Edward, elected in 1868, botanist. Pro- 

 fessor of Botany at Amherst College, and the highest 

 American authority on lichens at the time of his death. 



Verrill, Addison Emory, elected in 1872, naturalist, 

 Professor of Geology in the Sheffield Scientific School 

 and curator of geology at the Peabody Museum of 

 Yale University, also he has been engaged in deep- 

 sea dredging under the auspices of the United States 

 Fish Commission. 



Walker, Francis Amasa, elected in 1878, statistician 

 and economist, superintendent of the ninth and tenth 

 census and President of the Massachusetts Institute 

 of Technology, also author of books on political econ- 

 omy. 



*Warren, Gouveneur Kemble, elected in 1876, engineer, 

 major in the United States Corps of Engineers, and 

 holding brevet rank of major-general United States 

 army, chief of engineers of the Army of the Potomac, 

 and permanent commander of the Fifth Corps of the 

 army. 



*Watson, James Craig, elected in 1867, astromoner, 

 Professor of Astromonv at the University of Michi- 

 gan, Ann Arbor, and discoverer of twenty-two plan- 

 etary bodies. 



Watson, Sereno, elected in 1889, botanist, curator of 

 the herbarium at Harvard University, Cambridge, 

 Mass. 



White, Charles Abiathar, elected in 1889, paleontolo- 

 gist, in charge of the department of mesozoic inverte- 

 brates in the United States Geological Survey, Wash- 

 ington, D. C. 



Whitney, Josiah Dwight, original member, but has 

 since resigned, geologist, formerly Stute Geologist of 

 California, and now Professor of Geology at Harvard 

 University. 



Whitney, William Dwight, elected in 1865, and has 

 since resigned, philologist, Professor of Sanskrit and 

 Comparative Philology at Yale University and editor 



