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.