TODAY

FIELD TRIP conducted by Donald Wyman, horticulturist at the Arnold Arboretum, starts at the Administration Building of the Arboretum Jamaica Plain, at 10 a.m.

LUIGI FERDINANDO TAGLIAVINI of the Conservatory of Bolzano, Italy will speak on "Early Italian Organs and Organ Music" in Room 2 of the Music Building at 2 p.m.

ERWIN D. CANHAM, editor of the Christain Science Monitor, will discuss Spritual Strength in a Changing World" in Harkness Commons at 8 p.m.

SUNDAY

MEMORIAL CHURCH preacher is the Rev. William B. J. Martin of the First Community Church, Dallas, Texas.

CYRUS H. GORDON, professor of Near Eastern studies at Brandeis University will speak on "The Heroic Age of Israel and of Greece" at 11:15 a.m. in Hillel House. This is the second of the Ninth Annual Israll Goldman Memorial Lectures, a series of five lectures entitled "Before the Greeks and the Hebrews."

EDWARD M. PURCELL, Gerard Gade University Professor, will discuss "False Analogies and Misunderstood Models" at the Hillel Round Table of World Affairs in PBH at 4 p.m.

"THE PHILOSOPHY OF BELIEF and UNBELIEF" is the title of the first Michael Novak Lecture at the Catholic Student Center at 8 p.m.

MONDAY

PRESIDENT AND FELLOWS OF HARVARD COLLEGE will meet in Massachusetts Hall at 9:30 a.m.

REIMAR LUST, of the MacPlanck Institut , Germany, will discuss "The Solar Atmosphere and the Interplanetary Medium in Jefferson Laboratory at 4:45 p.m.

MICHAEL GRANT, president, Queen's University, Belfast, North Ireland, will discuss "Portraiture in Roman Coins" in Boylston Hall at 5 p.m.

HARVARD OUTING CLUB will conduct a general membership meeting in the Lowell House Tower room at 7:30 p.m.

YOUNG DEMOCRATS OF HARVARD AND RADCLIFFE will meet in the Peabody Room of PBH at 8 p.m. to elect a new president.

BERTRAND DE JOUVENEL, French economist, will discuss "The Manners of Politics" in Littauer Center Auditorium at 8 p.m.

TUESDAY

TORKEL WEIS-FOGH, John M. Prather Lecturer on Biology, will discuss "Principles of Flapping Flight and the Call for Power" in Burr B at 5 p.m.

A. RICHARD DIEBOLD, JR., instructor in social anthropology, will discuss the "contributions of Other Sciences in the Search for Linguistic Universals" in Boylston Hall at 7:30 p.m.

ESPERANTO CLUB will conduct an organizational meeting and language lesson in Sever 30 at 7:30 p.m. All invited.

DONALD L. GRAF, research fellow in geophysics, will address a joint meeting of the Harvard Geological Conference and the Boston geological Society in the Geological Lecture Room at 8 p.m.

WEDNESDAY

DAVID V. TIEDMAN, professor of education, will be chairman of a panel discussion of "Factors Which Mold Women's Careers" in the Loeb at 10 a.m.

VIKTOR O. KONONENKO, of the Institute of Machine Studies of the Academy of Sciences of the USSR, will speak on "Energy Relations in Autonomous Nonlinear Systems" in Room 209, Pierce Hall, at 4 p.m.

GABRIEL H. MARCEL, William James Lecturer on Philosophy and member of the Institute de France, will discuss "The Existential Background of Human Dignity" in Emerson D at 4:30 p.m.

DR. LUIS F. LELOIR, Edward K. Dunham Lecturer, will present the sequel to his Monday lecture at 4:30 p.m. in Emerson D.

TORKEL WEIS-FOGH will discuss "The Wing Muscles and the Chemical Machinery for Flight," a sequel to his talk on Tuesday, in Burr B at 5 p.m.

THURSDAY

MATHEMATICS COLLOQUIUM, sponsored by Harvard, MIT, and Brandies, will discuss "Group-like Structure in Topology and Algebra" in Room 2-390 at MIT at 4:30 p.m.

SIR AUSTIN BRADFORD HILL, University of London, will discuss "The Planning of Observations and Experiments" at 25 Shattuck St., Boston, at 5 p.m.

TORKEL WEIS-FOGH will deliver the third in his series of lectures, "Elastic Materials, Power Economy, and Nervous Control of Flight" in Burr B at 5 p.m.