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Please read this information carefully before using our online booking system.

The COVID-19 Information for Researchers information sheet provides complete information about our vaccination and masking mandates. Researchers must show proof of vaccination upon entering the building. PHS reserves the right to cancel or reschedule your appointment due to staffing shortages, unexpected closure, and/or advisories from the City of Philadelphia and the Commonwealth of Pennsylvania.

In-person research is available by appointment only.

Appointment times are:

  • Wednesdays, 12:00 p.m. to 4:00 p.m.
  • Thursdays, 9:00 a.m. to 4:00 p.m.
  • Fridays, 9:00 a.m. to 4:00 p.m.

You may book up to four appointments at one time. In an effort to make our reading room as accessible to as many researchers as possible, we ask that you please only reserve the appointments you think you will need in order to conduct your research.

The number of seats available for researchers is limited. Please reserve only one person per appointment slot. Exceptions will be made for patrons who require physical assistance for research.

The society is closed on weekends and most holidays. See our calendar for exceptions to our normal hours.

Please contact the reference staff at or 215-627-1852 if you need assistance.

To see available dates, first select either "Half Day Research Appointment" or "Full Day Research Appointment" below. Click the date you would like to book, then click the time. Add your details to the form and click "Book." You will receive an email confirmation.