Appointments are optional, but encouraged. We recommend that researchers speak with reference staff to ensure collection material is accessible during their visit. To consult with a reference librarian, please call (202) 707-5639 or submit an Ask-a-Librarian query. If you'd like to book an appointment, please use our appointment reservation system.
The Library of Congress asks all visitors to follow our COVID-19 health screening protocols, which are based on guidance from the Centers for Disease Control and Prevention and the Office of the Attending Physician of the United States Congress. For additional instructions, see the Researcher Scheduling page.

About Science Reference General Information Research Guides By Subject Science Tracer Bullets Technical Reports & Standards Volunteer Internship Program   Lectures, Classes and Other Upcoming Events View ST&B Webcasts Featured Webcast Annual Cancer Moonshot Panel: Immunotherapy and Beyond	Everyday Mysteries: Fun Science Facts Why is it hot in summer and cold in winter? Above: Carol Highsmith, photographer. Soybean and corn fields ready for harvesting in late summer in Carroll County, Indiana. 2016. Carol M. Highsmith Archive, Library of Congress, Prints and Photographs Division. New Research Guide Medieval Islamic Science: A Resource Guide Above: Carol M. Highsmith, photographer. Astronomy mosaic surrounded by Mathematics, Geology, Physics, and Chemistry plaques. 2007. Carol M. Highsmith Archive, Library of Congress Prints and Photographs Division.	Location John Adams Building Science & Business Reading Room 2nd St./Independence Ave. SE Fifth Floor, Room LA 500 Washington, DC 20540-4750 Tel: 202-707-5639 View Map/Floor Plan Hours of Service   Contact Us Read Our Blog      RSS Feeds | Email Updates Support the Division Friends of the Science, Technology & Business Division Support us through the Marvin McFarland Fund   Plan Your Visit Register for Tours and Classes   Ask a Librarian Online Reference Service
Science Reference Services (part of the Science, Technology and Business Division) is the principal location for research in the areas of science, technology, technical reports, and standards.