398 



AMERICAN MEX OF SCIENCE 



Mental Diseases^ 03- A.A; Am. Med. Ass. 

 (chairman, sect, nervous and mental diseases, 

 02) ; Neur. Ass. (v. pres, 08, 09) ; Medico- 

 Psychol. Ass; Cincinnati Acad. Med. (pres, 07) ; 

 Neur. Soc. of Cincinnati (pres, 19) ; cor. mem. 

 N. Y. Linnean Soc; hon. mem. Brooklj-n Neur. 

 Soc; Eoyal Soc. Med. Anthropology; psychol- 

 ogy; psychiatry; bacteriology of paresis; struc- 

 ture of brain membranes; topography of brain; 

 pre-historic Ohio. 



Langdon, Dr. Seth C(hapin),, 1632 Cliicago Ave, 

 Evanston, 111. Chemistry. Leadville, Colo, June 

 18, 87. B.S, North-western, 11; A.M, "Washing- 

 ton (Seattle), 13, Ph.D, 15. Instr. chem, Wash- 

 ington (Seattle), 15-18; assoc. chemist. Bur. 

 Standards, 19; asst. prof, chem, Northwestern, 

 19- Research chemist, C.W.S, U.S.A. 18. A.A; 

 Chem. Soc; Electrochem. Soc. Electrochemis- 

 try; passivity; carbon monoxid; gas control of 

 steel. 



Lange, Dr. Mathilde Magarethe, U. S. Department 

 of Agriculture, 641 Washington St, New York, 

 N. Y. Zoology. New York, April 14, 88. 

 Ph.D, Zurich, 19. With U. S. Dept. Agr, 20- 

 N. Y. Zool. Soc; Ziirich Nat. Gesell. Inverte- 

 brate zoology; histology; marine biology; re- 

 generation. 



Lange, Prof. N(orbert) A(dolph), Case School of 

 Applied Science, Cleveland, Ohio. Chemistry. 

 Sandusky, Ohio, Aug. 4, 92. A.B, Michigan, 

 15, M.S, 17, Ph.D, 18. Instr. org. chem, Michi- 

 gan, 17-19; asst. prof. Case, 19- Chem. Soc. 

 Organic chemistry; condensation of isocyanic 

 acid and of phenols. 



Langelier, Prof. Wilfred F(raiicis), Berkeley, 

 Calif. Chemistry. Nashua, N. H, Sept. 25, 86. 

 B.S, N. H. Col, 09; M.S, Illinois, 11. Asst. 

 chem, Illinois, 09-11; chemist, 111. Water Surv, 

 11-16; asst. prof, sanit. eng, California, 16- 

 Sanit. engineer, U. S. Shipping Board, summer, 

 18; U. S. Pub. Health Ser^-ice, 18-19. Water 

 supply; sewage treatment. 



Langenbeck, Karl, 1625 Hobart St, N. W, Wash- 

 ington, D. C. *Chemistry, Ceramics. Cincin- 

 nati, Ohio, Oct. 7, 61. Col. of Pharmacy, 

 Cincinnati, 82 ; Polytech, Zurich, 83 ; Charlotten- 

 burg, 84. Supt, Eookwood Pottery Co, Cincin- 

 nati, 86; prof, chem, Miami Med. Col, 88-90; 

 chemist. Am. Encaustic Tiling Co, 90-93; man- 

 ager, Mosaic Tile Co, Zanesville, Ohio, and N. 

 Y. City, 94-04; Ceramic Lab, Boston, 04- 

 Assoc. ed, 'Jour. Indust. and Eng, Chem,' 08- 

 A.A; Chem. Soc. Difference between glass and 

 pottery glazes; aventurin glazes; chemical char- 

 acter of American pottery glazes; kiln construc- 

 tions and foundations; fire clays of the United 

 States; plasticity; nutrition and psychology. 



Langenberg, Dr. Frederick C(harles), 25 Lake- 

 view Ave, Cambridge, Mass. Metallurgy. Ohio, 

 90. M.S, Ohio, 12; Sc.D, Harvard, 15. Instr. 

 metal, Harvard, 12-15; metallurgist, Watertown 

 Arsenal, 15-, ordnance dept, JJ.S.A, 19- Ed, 

 'Tests of Metals,' 15- Mech. Eng; Soc. Test. 

 Mat. Impact tests; heat treatment; cementa- 

 tion by gas. 



Langfeld, Prof. Herbert S(idney), 38 Francis 

 Ave, Cambridge, Mass. ^Psychology. Phila- 

 delphia, Pa, July 24, 79. Haverford, 97-98; 

 Ph.D, Berlin, 09. Research fellow, JSarvard, 



09-10, instr. psyohol, 10; asst. prof, and direc- 

 tor of lab. A.A; Psychol. Ass; Exp. Psy- 

 chol. Gesell. Pupillary action; visual sensa- 

 tions; inhibitory processes; voluntary action; 

 psychological effects of fasting; experimental 

 esthetics. 



Langford, Grace, Barnard College, Columbia Uni- 

 versity, New York, N. Y. Physics. Plymouth, 

 Mass, June 27, 71. B.S, Mass. Inst. Tech, 00. 

 Instr. physics, Wellesley, 99-05; Barnard, Co- 

 lumbia, 08- A.A; Physical Soc. Selective re- 

 flection of phosphates in the infra-red spectrum. 



Langley, Dr. Ealph W(alker), 84 McKinley Ave, 

 New Haven, Conn. Chemistry. New Haven, 

 Aug. 11, 80. Ph.B, Yale, 02, M.S, 04, Ph.D, 

 10. Asst. city chemist, St. Louis, 03-05; prof. 

 chem, N. Y. Homeop. Med. Col, 05-08; chemist, 

 and later asst. production manager. Acme Wire 

 Co, 10- Special research, U. S. Forestry Service, 

 summer, 07. Chem. Soc. Determination of 

 small amounts of barium in rocks; determina- 

 tion of tantalum and columbium. 



Langman, Harry, 35 W. 61st St, New York, N. Y. 

 Mathematics. New York, Nov. 7, 89. B.S, 

 Col. City of N. Y, 11 ; Columbia. Mem. statist, 

 bur, Metropolitan Life Ins. Co, 15-16; chief 

 statist iciiin. Ocean Accident and Guarantee 

 Corp, 16-18; Bur. Jewish Social Besearch, 19-; 

 instr. statist. Col. City of N. , 19- Head, 

 statist, div, Youroveta Home and Foreign Trade 

 Co. A.A; Math. Soc; Math. Ass; Statist. Ass. 

 Mathematical and applied statistics. 



Langmuir, Dr. A(rthur) C(omings), Oakledge, 



Hastings-on-Hudson, N. Y. Chemistry. Chicago, 

 111. Feb. 7, 72. Ph.B, Columbia, 93 ; Ph.D, Heidel- 

 berg, 95. Asst. to Prof. C. F. Chandler, N. Y. 

 City, 95-96; head chemist, Ricketts and Banks, 

 N. Y. City, 96-00; chemist and supt, Marx and 

 Rawolle, Brooklyn, 00-20; research chemist, SO-, 

 assoc. prof. chem. eng, Columbia, 20- Instr, 

 Pratt Insrt, 98-00; lecturer, Brooklyn Polytech, 

 05. A.A; Chem. Soc. (chairman, N. Y. sect, 

 12); Soc. Chem. Indust; Electrochem. Soc; 

 Chem. Eng. (v. pres, 17-19). Analysis and tech- 

 nology of shellac and glycerine. 



Langmuir, Dr. Irving, Research Laboratory, Gen- 

 eral Electric Co, Schenectady, N. Y. * Chemis- 

 try. Brooklyn, N. Y, Jan. 31, 81. Met.E, Co- 

 lumbia, 03; Ph.D, Gottingen, 06. Instr. chem, 

 Stevens, 06-09; research chemist. Gen. Elec. Co, 

 09- Nichols medal, Chem. Soc, 15, 20; Hughes 

 medal, Royal Soc, 18. Nat. Acad; A.A; Chem. 

 Soc; Electrochem. Soc ; Physical Soc; Am. Acad. 

 Kinetics of gas reactions, especially at low pres- 

 sures; dis-sociation of hydrogen; nitrogen and 

 argon filled tungsten lamps; vapor pressures of 

 metals; production of high vacuum; electron 

 discharges; constitution of solids and liquids; 

 adsorption; surface tension; structure of atoms; 

 theory of chemical valence: ionization of gases; 

 acoustic devices for submarine detection. 



Langsdorf, A(lexander) S(uss), 1205 Amherst 

 Place, St. Louis, Mo. Electrical engineering. 

 St. Louis. Aug. 31, 77. B.S, Washington (St. 

 Louis), 98; M.M.E, Cornell, 01. Instr. physics, 

 Washington (St. Louis), 98-00, asst. prof. elec. 

 eng, 01-04, prof, 04-20, dean, sch. eng, 10-20; 

 indrist. eng, Crundcn Martin Mfg. Co, SO- A.A ; 

 Elec. Eng; Eng. Educ; St. Louis Acad; St. 



