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Deflection galvanometer, composed of two stationary inner coils and one revolving outer coil. Possibly made in the Caltech Physics Shop, ca 1920s–1930s. Photo ID ST-PH-28






The Archives Reading Room is open by appointment only.

Please note our current policy concerning visitors to the Caltech campus:

  • Caltech requires all visitors to campus buildings to be fully vaccinated against COVID-19.  We will ask you to show us documentation of your vaccination and booster before admitting you to the building.

  • All staff and visitors are required to wear snug-fitting N95, KN95, or KF94 masks in the Archives and other Caltech Library spaces. If you do not have such a mask, we can provide one.

For research assistance please contact archives[at]


To submit a request for an appointment or for copies of materials, please register for an Archives account. You may submit a request as soon as you have created your account.

For general inquiries, please contact us in the following manner:

Fax (626) 395-4073
Telephone (626) 395-2704
U.S. Mail Caltech Archives
Mail Code B215A-74
Pasadena, California 91125


The Caltech Archives Staff

Peter Collopy
University Archivist and Head of Archives and Special Collections

(626) 395-2702

Loma Karklins
Reference Archivist

(626) 395-2704

Penelope (Penny) Neder-Muro
Collections and Metadata Archivist

(626) 395-2503

Elisa Piccio
Audiovisual Collections Archivist

(626) 395-2502

Maria (Mariella) Soprano
Senior Collections and Special Projects Archivist

(626) 395-2501

Heidi Aspaturian
Senior Editor and Interviewer

(626) 395-2704


The Archives Reading Room is open by appointment only.

For research assistance please contact archives[at]


Archives Reading Room Hours:
Monday through Friday
8:30 a.m. to 11:45 a.m. and 1 p.m. to 4 p.m.
(early closing on Thursday mornings at 11:00)

We are closed on weekends and major U.S. holidays.

Upcoming holidays:

  • Monday, February 15th 2022 (President's Day)
  • Monday, May 31st 2022 (Memorial Day)
  • Monday, July 5th 2022 (Independence Day)

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