The libraries' fall hours, effective September 9 through December 18, are as follows.
Admin. Offices -- Mon-Fri: 9am-5pm; Sat-Sun: closed.
Aero & Astro -- Mon-Fri: 8:30am-6pm; Sat: 11am-6pm; Sun: 1-5pm.
Barker -- Mon-Thurs: 8:30am-11pm; Fri: 8:30am-7pm; Sat: 11am-6pm; Sun: 1-11pm.
Computerized Literature Search Service -- Mon-Fri: 9:30am-5:30pm; Sat-Sun: closed.
Dewey -- Mon-Thurs 8:30am-11pm; Fri: 8:30am-7pm; Sat: 11am-6pm; Sun: 1-11pm.
Document Services -- Mon-Fri: 9am-5pm; Sat-Sun: closed.
Humanities -- Mon-Fri: 7am-midnight; Sat: 8am-midnight; Sun: 10am-midnight.
Institute Archives -- Mon-Fri: 11am-4:30pm; Sat-Sun: closed.
Lewis Music -- Mon-Thurs: 8:30am-10pm; Fri: 8:30am-7pm; Sat: 11am-6pm; Sun: 1-10pm.
Lindgren -- Mon-Thurs: 9am-9pm; Fri: 9am-6pm; Sat: 11am-6pm; Sun: 1-9pm (Please note that Lindgren hours for the non-MIT community will be limited on evenings and weekends).
Reserve Book Room -- Mon-Thurs: 8:30am-11pm; Fri: 8:30am-7pm; Sat: 11am-6pm; Sun: 1-11pm.
RetroSpective Collection -- Mon-Fri: 9am-5pm; Sat-Sun: closed.
Rotch -- Mon-Thurs: 8:30am-11pm; Fri: 8:30am-7pm; Sat: 11am-6pm; Sun: 2-10pm.
Rotch Visual Collections -- Mon-Fri: 8:30am-6pm; Sat-Sun: closed.
Schering-Plough -- Mon-Thurs: 9am-7pm; Fri: 9am-6pm; Sat: closed; Sun: 2-5pm.
Science -- Mon-Fri: 7am-midnight; Sat: 8am-midnight; Sun: 10am-midnight.
Schedules are also on the web.
A version of this article appeared in MIT Tech Talk on September 16, 1998.