Images

This is a pack saddle used by Arnold Hague in the late 1800s. The wooden saddle has leather straps and a cinch used for the animal's comfort when carrying especially large loads. Pack saddles could be used to carry panniers or other large objects.
Object ID: USGS-000014

This is a Coleman lantern used by field scientists at campsites. This particular lantern has a black leather case with a spring inside the lid to stabilize the lantern during travel.
Object ID: USGS-000038

Objects like this canteen and canvas case tell about the daily activities of scientists in the field. Life centered around the campsite and is extremely different than the experiences of today's scientists.
Object ID: USGS-000065

This alidade consists of straightedges with a rigidly-mounted telescope that can be rotated through the vertical angle ±30. The telescope is set on a high standard or post (4 inches in height) to raise it above the table. The telescope for the high standard is 16 power, inverting type with internal focusing.

Manufactured by W. & L.E. Gurley, Troy, New York. The micrometer attachment us a modification of the tangent screw attached to the horizontal axis of the telescope and used for measuring vertical angles in terms of their tangents. Relatively few of these types of alidades are listed in early 1900s property records of instruments used by the U.S.

Stereoscopy, stereoscopic imaging or 3-D (three-dimensional) imaging is any technique capable of producing three-dimensional visual information or creating the illusion of depth in an image. This apparatus was manufactured by Oculus.
Object ID: USGS-000192

This device records atmospheric pressure and uses twelve stacked aneroid barometer cells in its mechanism to move a pen upon paper, both of which are attached to a drum moved by clockwork. The apparatus is enclosed in a wooden cabinet with set-in glass viewing pane.
Object ID: USGS-000242

Object has its original Case. A graduated circular protractor with pivoting arm, it is used for measuring or marking off angles. This instrument was manufactured by Bowen & Company and was first used by the U.S. Army Corp of Engineers before being transferred to the U.S. Geological Survey.
Object ID: USGS-000252

Original Box & Booklets. Marketed as being made of Ivorite, this slide rule was manufactured by Keuffel & Esser Company, New York & New Jersey in the 1960s.

An early optoelectronic instrument manufactured by Ernst Leitz G.m.b.H., Wetzlar, Germany, serial #25748. The instrument consists of a weighted stand with optics device with attached power cord, transformer box ("Regel-Transformator / Nur für Wechselstrom / 120/220 Volt - 50 HZ / Typ REDYX Nr. 25748 / Leitz-Speziallampe 6V. 5Amp. / max.

Manufactured by Mine Safety Appliances Company sometime after 1914, the wood cabinet-like chest includes an analytical balance, pans and flasks.
Object ID: USGS-000259

Manufactured by the Bausch and Lomb Optical Company. Stereographs and stereo compilation glasses are used in the photogrammetry, which is the process of making maps or scale drawings from photographs, especially aerial photographs.
Object ID: USGS-000276