Due to exhibition construction, the museum is closed today (March 12) and will open at 1pm tomorrow (March 13).

Curious about the other half of the Science History Institute? Step into the Othmer Library of Chemical History!

Since its founding in 1988, the Othmer Library at the Science History Institute has been a haven for research in the history of science—but there’s more to the story. Explore the reading room on a guided tour, learn how our collection has grown, and discover why we have one of the most comprehensive rare book collections on chemistry and its alchemical roots.

The Othmer Library is getting into the Halloween spirit with a special edition tour! Discover how to use chemistry to dazzle guests with a “magic” trick for your Halloween party. You’ll also learn about the surprising science behind Mae Starr, the doll that sings.


Othmer Library Tours are available every other Wednesday at 12pm and on the first Friday of most months at 4pm.

Registration is required for Wednesday tours; First Friday tours are drop-in. Guests under 14 years of age must be accompanied by an adult.

More events

person doing research in a library
March 13, 2026
Library Programs & Activities

Othmer Library Tour

Curious about the other half of the Science History Institute? Step into the Othmer Library of Chemical History!

illustration of a building
March 13, 2026
First Fridays

Philadelphia: Workshop of the World

Join us for March First Friday as we unveil Philadelphia: Workshop of the World, the latest exhibition from our A Closer Read series.

March 14, 2026
For Families

Stories of Science: Celebrating Women’s History

Join us in our museum EVERY SATURDAY for a family-friendly program that highlights strange and surprising stories from the history of science!

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