Description:
- Object ID: ALSA 2007.05.01
- Made by: W. & L. E. Gurley, Troy, NY
- Model: Unknown.
- Serial Number: 512054 (See comentary)
- Date Made: Unknown.
- Approximate size: Base plate length 38 cm.
- Accessories: Wooden carrying case, stride level, sun shade for the lens and lens cover, right-angle prism eye piece and eye piece cover, two adjusting pins, small screwdriver, small vial of oil.
- Condition: Good
Commentary:
The alidade has a vertical circle and attached to the base plate is a trough compass. On the top of the Alidade’s base plate is printed “W. & L. E. GURLEY TROY, N. Y., USA 512054.” 512054 may be the serial number. Other numbers on the top of the base plate are: “999-111-168P” and “G.51-60”
On the inside of the 41 X 23 X 5.5 cm carrying case are labels for: stadia measuring, instructions for shipping and instructions for cleaning the lens. On the label for stadia measuring the manufacturers name “W. & L. E. GURLEY, TROY, N.Y. U.S.A. along with the number “3085B” is printed. On the top of the carrying case is etched “G-51-60”.
Source of Object: Unknown, part of original collection.
Notes: The Society has two other Alidades of this type in its collection: a K & E (ALSA 2012.02.02) and a Bausch & Lomb (ALSA 2010.06.07).
References: Visit article The Survey Instrument Captain Cook Wanted to Learn – The Plane Table and Alidade for additional information.
Description by: Entered by Ed Titanich on December 23, 2024.