Fogg Museum. Mon.-Sat., 10-5, Sun.2-5. The University art museum, in addition to its excellent permanent collection (well stocked by generous old grads), is a stopping place for many travelling and special exhibitions. Currently on display: "Photography Unlimited"--through Oct. 16, unusual and sometimes disturbing experimental images by contemporary photographers. Also: "19th and 20th Century American Portraits in Prints, Drawing and Sculpture"--through September. Artists exhibited include Sargent, Copley and Whistler--a great chance to find out what Louis Agassiz really looked like. Todd McKie, who last year drew some snide comments for his cartoon-like watercolors in a show at the Museum of Fine Arts, is featured in "Contemporary Boston Artists: Works on paper", through Sept. 29 on the drawing balcony. I was one who disdained his long-nosed humanoid figures, and their omission in these works is a definite improvement.

The Busch-Reisinger Museum houses Harvard's collection of German art, both medieval and modern. On display now are some works of 20th c. German Expressionists--always worth a special trip. Open 9 a.m.-4:45 p.m., Mon.-Sat., with free organ concerts in the main hall Thursdays at noon.

Also of Interest: "Pablo Picasso--Printmaker" through December 8 at the Museum of Fine Arts (Arborway subway to Northeastern stop). An exhibition of books on Hans Holbein's sixteen-frame woodcut "The Dance of Death", through Sept. 30 at the Boston Athenaeum, 10 Beacon St. In Boston. Photographs by Dadaist Man Ray in the Jewett Arts Center at Wellesley College, Sept. 30-Nov. 3. And, for all you frustrated peeping toms, photographs by Ron Galella, who is currently making a fortune off his new book on Jackie Onassis, at the Boston Harbor Campus of UMass, through October 8.