AMERICAN MEN OF SCIENCE 



189 



aminer pliilos, Trinity (Can.), 92-94; prof, 

 philos, Eobart, 97- Psychol. Ass; Philos. Ass. 

 Philosophy, especially German philosophy and 

 epistemology. The nature of personality; logic; 

 epistemology ; metaphysics. 



Leighton, Marshall 0(ra), U. S. Geological Sur- 

 vey, Washington, D. C. Sanitary and hydro- 

 graphic engineering. Corinna, Me, May 1, 74. 

 B.S, Mass. Inst Tech, 96. Supt. Health, Mont- 

 elair, N. J, 96-02 ; res. hydrographer, U. S. Geol. 

 Surv, 02-, chief, Div. of Eydro-Econ, 03- Practis- 

 ing sanit. engineer and consulting expert, 00; 

 North N. J. Flood Commission, 03-; Passiac 

 River Flood Commissioner, 05. Assoc, mem. 

 Civil Eng; Pub. Health Ass; Soc. Testing Ma- 

 terials; New Eng. Water Works Ass. Public 

 hygiene ; sewage disposal ; water purification 

 and economics and vital statistics relating 

 thereto. Duration of heart standstill with min- 

 imal and supraminimal vagus stimulation; bac- 

 teria in milk; pecuniary value of life; sewage 

 pollution in metropolitan area; Passiac floods 

 of 1902 and 1903; etc. 



Leith, Dr. C(harles) K(enneth), 240 Langdon St, 

 Madison, Wis. Geology. Trempealeau, Wis, 

 Jan. 20, 75. B.S, Wisconsin, 97, Ph.D, 01. 

 Asst. prof, geol, Wisconsin, 02-03, prof, 03- 

 Asst. geol, U. S. Geol. Surv, 00-05; non-res. 

 prof, struct, and metamorph. geol, Chicago, 

 05- Geol. Soc. Pre-Cambrian, structural, 

 metamorphic and economic geology. Geology of 

 the United States iron districts and origin of 

 iron ores. 



Leng, Charles William, 119 Columbia St, West 

 New Brighton, N. Y. Entomology. West New 

 Brighton, April 6, 59. B.S, Brooklyn Polytech, 

 77. Senior partner, John S. Leng's Son and 

 Co, merchants, 88- M.A.A; Brooklyn En torn. 

 Soc. (curator, 90) ; N. Y. Entom. Soc; Staten 

 Isl. Nat. Sci. Ass. Coleoptera; Cerambycidae ; 

 Donacia; Cicindelidae. The family Coccinel- 

 lidae; the tribe Cryptocephalini. 



Lengfeld, Dr. Felix, 202 Stockton St, San Fran- 

 cisco, Cal. *Chemistry. San Francisco, Feb. 

 18, 63. Ph.G, California, 80, grad. student, 84- 

 86 ; Hopkins, 86-88, fellow, 88, Ph.D, 88 ; Zurich, 

 Liege and Munich, 88-90. Prof, chem, S. Dak. 

 Sch. of Mines, 90-91; instr, California, 91-92; 

 docent, later instr. and asst. prof, Chicago, 92- 

 01; consulting and mfg. chemist, 01- F.A.A; 

 Chem. Soc; Soc. Chem. Indust; Chem. Gesell; 

 Soc. chim. de Paris. Organic and inorganic 

 chemistry. Chemi stry . 



Lenher, Prof. Victor, 158 Summit Ave, Madi- 

 son, Wis. *Chemistry. Belmond, la, July 13, 

 73. Dickinson, 90; certificate in chem, Penn- 

 sylvania, 93, Ph.D, 98. Asst. chem, California, 

 93-96; Columbia, 98-00; asst. prof. gen. and 

 theoret. chem, Wisconsin, 00-04, assoc. prof, 

 cliem, 04- Instr. chem, Evening High Sch, N. 

 Y. City, 99-00. F.A.A; Chem. Soc ; Wis. Acad; 

 Chem. Gesell; Soc. chim. de Paris. Inorganic 

 chemistry; rare elements. Tellurium; inor- 

 ganic chemistry. 



Lennon, Prof. William H, 107 Adams St, Brock- 

 port, N. Y. General science. Preston Hollow, 

 N. Y, Aug. 15, 38. A.B, Genesee, 67, A.M, 70. 

 Eead, Dept. Science, State Nor. Sch, Broclcport, 

 N. Y, 69-, v. principal, 82- F.A.A. 



Lenox, Prof. L(ionel) R(emond), Stanford Uni- 

 versity, Cal. Chemistry. Brooklyn, N. Y, 

 March 8, 65. Ph.B, Columbia, 88. Instr. 

 chem, Lehigh, 88-91; Stanford, 92-93, asst. 

 prof, 93-94, assoc. prof. anal, chem, 94-96, prof, 

 96- Chemist, Bur. Ordnance, U. S. N, 91-92. 

 Chem. Soc. 



Leonard, Prof. A(rthur) G(ray), University of 

 North Dakota, Grand Forks, N. Dak. Geology, 

 Mineralogy. Clinton, N. Y, March 15, 65. 

 A.B, Oberlin, 89, A.M, 95; Ph.D, Hopkins, 98. 

 Prof. geol. and biol, Western, 94-96; asst. 

 state geologist, la. Geol. Surv, 96-07 ; 

 asst. prof, geol, Missouri, 99-00; asst. state 

 geologist, la. Geol. Surv, 00-03; prof, geol, 

 North Dakota, and state geologist, 03~ Geol. 

 Soc; Nat. Geog. Soc; Iowa Acad. The lead, 

 zinc and coal deposits of Iowa; the Silurian for- 

 mations of northeastern Iowa; basic rocks of 

 northeastern Maryland. The Cretaceous and 

 Pleistocene formations of North Dakota. 



Leuba, Dr. James H(enry), Bryn Mawr, Pa. 

 *Psychology, Philosophy. Neuchatel, Switzer- 

 land, April 9, 68. B.S, Neuchatel, 86; Ph.D, 

 Clark, 95. Assoc, prof, psychol. and educ, 

 Bryn Mawr, 98- Psychol. Ass; Philos. Ass. 

 Psychology of ethics and of religion. 



Leuschner, Prof. A(rmin) O(tto), 2333 Cedar 

 St, Berkeley, Cal. * Astronomy. Detroit, 

 Mich, Jan. 16, 68. Grad, Royal Friederichs 

 and Wilhelms Gym, Cassel, Germany, 86; A.B, 

 Michigan, 88; California and Lick Observatory, 

 88-92; Ph.D, Berlin, 97. Instr. math, Califor- 

 nia, 90-92, asst. prof, 92-94, astron. and geod, 

 94-98, assoc. prof, and director, Students' Ob- 

 servatory, 98-, in charge, Berkeley Astron. Dept, 

 00- Hon. Sc.D, Western Univ. of Pa, 00. 

 Astron. and Astrophys. Soc; Math. Soc; Pacific 

 Astron. Soc; fel. Royal Astron. Soc; Astron. 

 Gesell. Theoretical astronomy. Perturbations 

 of the Watson asteroids; improvement in the 

 methods of determining preliminary orbits of 

 comets and planets. 



Levene, Dr. P(hoebus) A(aron Theodore), 129 W. 

 136th St, New York, N. Y. * Physiological 

 chemistry. Herter, Russia, Feb. 25, 69. St. 

 Petersburg Imp. Mil. Med. Acad, 91. Lecturer 

 path, chem, Univ. and Bellevue Eosp. Med. Col. 

 M.A.A; Soc. Nat; Physiol. Soc; Ass. Path, and 

 Bact; Chem. Soc; Soc. Exp. Biol, and Med; N. 

 Y. Path. Soc; Chem. Gesell. Chemistry of com- 

 bined proteids (mucoids and nucleins) ; bac- 

 terial chemistry; enzymes; embryochemistry ; 

 glycothionic acid; glycophosphoric and nucleic 

 acids; enzymes and antienzymes; autolysis of 

 animal organs; composition of proteases. 



Leverett, Frank, 312 N. Thayer St, Ann Arbor, 

 Mich. * Geology, Physiography, Eydrology. Den- 

 mark, la, March 10, 59. B.S, Iowa State, 85. 

 Instr. nat. science, Denmark Acad, la, 80-83 ; field 



