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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 CLOSED until further notice.
For research assistance please contact


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, Special Collections

(626) 395-2702

Loma Karklins
Archivist for Reader Services

(626) 395-2704

Penelope (Penny) Neder-Muro
Processing Archivist

(626) 395-2503

Elisa Piccio
Associate Archivist for Digital Collections Development

(626) 395-2502

Maria (Mariella) Soprano
Senior Archivist for Collection Management

(626) 395-2501

Heidi Aspaturian
Senior Editor and Interviewer

(626) 395-2704


The Archives Reading Room is CLOSED until further notice.
For research assistance please contact


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)

Please note: Access to the Caltech Archives for the non-campus community is by appointment only. Campus community is encouraged to phone or write ahead to be sure of staff assistance and space availability.

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

Upcoming holidays:

  • Monday, May 25th 2020 (Memorial Day)
  • Friday, July 3rd 2020 (Independence Day)
  • Monday, September 7th 2020 (Labor Day)
  • Thursday, November 26th- Friday, November 27th 2020 (Thanksgiving Holidays)
  • Monday, December 24th 2020 - Monday, January 1st 2021 (Christmas-New Year Holidays)

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