Open Sep.-May: Tues., Wed., Fri., and Sat. noon-4:00 P.M., Thursdays 4:00 P.M.-8:00 P.M.(closed Christmas and New Year's Day); June-Aug.: open 7-days a week 10:00 A.M.-4:00 P.M., Thursdays 10:00 A.M.-8:00 P.M. (closed July 4th).

Dedicated to the study of the medical past through a distinguished collection of rare books, museum artifacts, archives, and images. Open to the public Mon.-Fri. 10:00 A.M.-5:00 P.M. Open for researchers Mon.-Fri. 8:30 A.M.-5:00 P.M. Closed Sat., Sundays, and holidays.

Located at 48 E. Patrick St. in Frederick, Maryland. Also operates the Pry House Field Hospital Museum on Antietam National Battlefield.

Open Mar. 16-Nov. 14: Mon.-Sat. 10:00 A.M.-5:00 P.M., Sun. 11:00 A.M.-5:00 P.M.; Nov. 15-Mar. 15: Mon.-Sat. 10:00 A.M.-4:00 P.M., Sun. 11:00 A.M.-4:00 P.M. Admission: adults $6.50, seniors $6.00 (60 & up), college students: $6.00 (with valid ID), military: $6.00 (with valid ID), children 10-16 $4.50, children under 10 free.