The form below may be used to search the scientific objects and publications and manuscript database (both collections searched simultaneously). There is as yet no electronic catalog for the photographic plate collection.

You may enter one or more keywords, select a category, or both. If two or more search terms are employed (i.e., two or more keywords or one or more keywords plus a catagory) only items matching all terms are returned.

---

ENTER ONE OR MORE KEYWORDS:

AND/OR SELECT A CATEGORY (only available for scientific objects):

General Physical Apparatus Spectroscope Lenses and Mirrors Telescopes and Coelostats

Photographic Apparatus Eclipes Apparatus Meridian Circle / Transit Acc. Sextants and other instruments

Measuring Engines Radio Otherwise unclassified