AMERICAN MEN OF SCIENCE 



141 



85, M.Agr, 97. Asst. agr, Iowa State, 86; 

 assoc. ed, ' Prairie Farmer,' 87 ; asst. agr, Min- 

 nesota, 88-89, prof, 90-91; N. Dak. Agr. Col, 

 92-93; prof. agr. and v. director, Exp. Sta, Min- 

 nesota, 94-04; Asst. Sec'y of Agr, 05- F.A.A; 

 Soc. Prom. Agr. Sci; Soc. Hort. Sci. Plant 

 and animal breeding; farm economics; farm 

 management ; agricultural education. 



Hazen, Allen, St. Paul Building, New York, N. Y. 

 Water supply. Hartford, Vt, Aug. 28, 69. 

 M.H, C.A, M.A, Mass. Inst. Tech. In charge, 

 Exp. Sta, State Board of Health, Mass, 

 8S-93 ; practising civil engineer, Boston, 

 94-97 ; N. Y. City, 97- In charge sewerage dis- 

 posal, Columbian Expos, 93 ; chief engineer, 

 Albany Water Filtration Plant, 98-99. Row- 

 land prize, Civil Eng, 00. Am. Water Works 

 Ass; Civil Eng; Chem. Soc; Public Health Ass; 

 New Eng. Water Works Ass; New Eng. Soc. 

 Eng; Appalachian Mt. Club; Boston Soc. Civil 

 Eng. Filtration of public water supplies. 



Hazen, Miss Annah Putnam, Wilder, Vt. Zoology. 

 Wilder, Sept. 22, 72. B.L, Smith, 95; M.S, 

 Dartmouth, 97; Bryn Mawr, 97-99, fellow, 98- 

 99. Teacher biol, N. H. Nor. Sch, 99-00; asst. 

 zool, Smith, 00-03; teacher biol, High Sch, N. 

 Y. City, 03- Development of the coxal gland 

 in Limulus; gastrulation in Amphioxus; regen- 

 eration of sea-anemones. Regeneration of sea- 

 anemones. 



Hazen, Prof. John V(ose), 33 N. Main St, Han- 

 over, N. H. Engineering, Graphics. Royalston, 

 Mass, Nov. 22, 50. B.S, Dartmouth, 75, C.E, 

 76. Principal, Atkinson Acad, 77-78; tutor, 

 Dartmouth, 78-79, instr. civil eng, 79-80, prof. 

 civil eng. and mech, 80-93, civil eng. and 

 graphics, 93- Civil Eng; Eng. Educ. Engi- 

 neering. Improvement of country roads. 



Hazen, Dr. Tracy E(lliot), Barnard College, Co- 

 lumbia University, New York, N. Y. Botany. 

 Jericho Center, Vt, July 4, 74. A.B, Vermont, 

 97; A.M, Columbia, 99, Ph.D, 00. Director, 

 Fairbanks Mus. Nat. Science, St. Johnsbury, Vt, 

 01-02; asst. hot, Columbia, 02-03, tutor, 03- 

 F.A.A; Soc. Plant Morph. and Physiol; Torrey 

 Bot. Club; New Eng. Bot. Club; Vt. Bot. Club. 

 Algae, chiefly Chlorophyceae. 



Headden, Prof. W(illia)m P(arker), 322 E. Oak 



St, Fort Collins, Colo. Chemistry. Red Bank, 

 N. J, Sept. 21, 50. A.B, Dickinson, 72; Ph.D, 

 Giessen, 74; A.M, Dickinson, 75. Asst, Chem. 

 Lab, Pennsylvania, 74-76; prof, chem, Md. Agr. 

 Col, 80-84; Denver, 84-89; S. Dak. Sch. of 

 Mines, 89-91, dean, 92-93; prof, chem, Colo. 

 Agr. Col, 93- Colo. Sci. Soc. Mineralogy; 

 analytical and agricultural chemistry. Radia- 

 tion; mineral waters; digestion. 



Heald, Dr. F(rederick) D(eForest), University of 

 Nebraska, Lincoln, Nebr. Botany. Midland 

 City, Mich, July 23, 72. B.S, Wisconsin, 94, 

 fellow, 94-96, M.S, 96; Ph.D, Leipzig, 97. Prof, 

 biol, Parsons, 97-03; adj. prof, plant physiol, 

 Nebraska, 03-05, assoc. prof, bot, Sch. of Agr, 

 and botanist, Exp. Sta, 05- Instr. bot. and 

 zool, Summer Sch, Wisconsin, 94. F.A.A; Soc. 



Nat; Nebr. Acad, (sec'y) ; Int. Ass. Bot. Pul- 

 vini and photeolic movements; toxic action of 

 acids and salts on plants; conditions for germi- 

 nation of cryptogamic spores; regeneration of 

 moss gametophyte; electric conductivity of 

 plant juices. Crown gall of raspberry; a black 

 rot of apple; bacterial diseases of plants; etc. 

 Heany, J(ohn) Allen, York, Pa. Physics. 

 Philadelphia, Pa, March 15, 76. A.B, Central 

 High Sch, Phila, 95; special courses in chem. 

 and bacter. Instr. physics and mech, Cen- 

 tral High Sch, Phila, 95-98; research work, 

 98- Elec. Eng; Franklin Inst. Electric arc 

 lighting; fire-proof insulation for electric con- 

 ductors; chemistry of the rarer metals and the 

 incandescence of the same produced electrically. 

 Production of special compounds by electro- 

 chemical processes; electrical determination of 

 the spectrum. 



Heath, Prof. Harold, Palo Alto, Cal. "Zoology. 

 Vevay, Ind, June 5, 68. A.B, Ohio Wesleyan, 

 93; Harrison fellow, Pennsylvania, 96-98, A.M, 

 Ph.D, 98. Instr, Ohio Wesleyan, 90-93; prof, 

 biol, Pacific, 93-94; instr. invert, zool, Stanford, 

 94-96, asst. prof, 98-01, assoc. prof, 01- 

 Teacher invert zool, Hopkins Seaside Lab, 95- 

 00; hon. curator invertebrates, Acad. Nat. Sci, 

 San Francisco, Cal. Soc. Zool; Cal. Acad; 

 Wash. Acad; Pacific Coast Biol. Ass. Anatomy 

 and embryology of mollusks; anatomy and em- 

 bryology of the chitons of the west coast of 

 North America; anatomy of some Pacific ptero- 

 pods; Solenogastres. The later development of 

 chitons; cephalopods of Hawaii, Alaska and the 

 California coast; the Amphineura of Alaska 

 and the California coast. 



Hedgcock, Geo(rge) G(rant), Missouri Botanical 

 Garden, St. Louis, Mo. Phytopathology. 

 Augusta, Ills, Oct. 5, 63. B.S, Nebraska, 99, 

 fellow, A.M, 01. Principal pub. schools, Rus- 

 kin, Nebr, 90-92; Oak, Nebr, 92-94; asst. bot, 

 Nebraska, 99 ; scientific aid, 77. S. Dept. Agr, 

 01, asst. path, 02- F.A.A; Mycol. Soc; Nebr. 

 Acad; Int. Ass. Bot. The relation of the phys- 

 iological water in the soil to that in plants; 

 Thorea; new apparatus for phytopathological 

 work; proof of the identity of Phoma and Phyl- 

 losticta on the sugar beet. Crown gall diseases 

 of trees, etc; wood-blackening fungi; Botrytis 

 and Sclerotinia. 



Hedrick, Dr. E(arle) R(aymond), University of 

 Missouri, Columbia, Mo. * Mathematics. Union 

 City, Ind, Sept. 27, 76. A.B, Michigan, 96; 

 Shattuck scholar, Harvard, 97-98, A.M, 98, 

 Morgan fellow, 98-99, Parker fellow, 99-01; 

 Ph.D, Gottingen, 01; Paris, 01. Instr. math, 

 High Sch, Sheboygan, Wis, 96-97; Sheffield Sci. 

 Sch, Yale, 01-03; prof, Missouri, 03- Math. 

 Soc; Math. Verein; Soc. math, de France; 

 Circolo Mat. di Palermo. Differential equa- 

 tions; calculus of variations; characteristics 

 of differential equations. Foundations of me- 

 chanics; pseudocontact transformations; non- 

 analytic functions of a complex variable. 



