Twenty-one appointments to the teaching and research staff at Harvard, effective July 1, were announced by the University today, as follows:

Instructor in Alternating Currents: Elmer C. Easton, of Newark, N. J., S.D. Harvard '42.

Research Fellows in Biology: Robert T. Brumfield, of Farmville, Va., Ph.D. Yale '42 and Arnold H. Sparrow, of Saskatoon, Sask., Canada, Ph.D. McGill '41.

Instructor in Electronics: John I. Daspit, of New Orleans, La., S.M. Louisiana State University '40.

Teaching Fellows in Electronics: William C. Bohn, of Maplewood, N. J., S.B. Harvard '25; George L. Harvey, of Atlanta, Go., S.M. University of Arkansas '40; James R. Hooper Jr., of Dedham, Mass., S.M. Harvard '39; Alfred Keck, of Hyde Park, Mass., S.M. Harvard '41; Yu-yueh A. Mao, of Pingyueh, Kweichow, China, S.M. Harvard '41; David Middleton, of New York, N. Y., A.B. Harvard '42; Sidney Soloway, of Worcester, Mass., S.B. Worcester Polytechnic Institute '41; Leo W. Tobin Jr., of Flint, Mich., A.B. Harvard '42; and Guy Worsley, of Pennington, N. J., A.M. Cambridge University, England, '29.

Teaching Fellows in Government and Tutors: Pomylos C. Macridis, of Cambridge, Mass., graduate, law school, University of Paris '40; Robert A. Scalapino, of Cambridge, Mass., B.A. Santa Barbara State College '40; and Harry C. Thomson, of Cambridge, Mass., A.M. Harvard '34.

Teaching Fellows in Mathematics and Tutors: Richard F. Arens, of San Marino, Calif., A.M. Harvard '42; James B. Crabtree, of Lawrence, Kans., B.S. University of Kansas '41; and Roger C. Lyndon, of Cambridge, Mass., A.M. Harvard '41.

Teaching Fellow in Mineralogy: Raymond A. Nelson, of Butte, Mont., M.S. Montana School of Mines '39.

Instructor in Philosophy and Tutor: George D. W. Berry, of Cambridge, Mass., Ph.D. Harvard '42.