Description:
- Object ID: ALSA 2016.01.09
- Made by: Bausch, Lomb, Saegmuller Co. of Rochester, NY.
- Model: Unknown.
- Serial Number: 6451
- Date Made: Circa 1905 to 1907.
- Approximate size: Height:46 cm, width: 40 cm, width with telescope horizontal: 58 cm,
- Accessories: Striding level (ALSA 2016.01.10)
- Condition: Fair for its age, does not rotate freely on it horizontal axis.
Commentary:
This theodolite was made by Bausch, Lomb, Saegmuller Co. of Rochester, NY. It comes with a stride level (ALSA 2016.01.10) which is mounted on the theodolite. Etched on a brass plate on the theodolite is “BAUSCH, LOMB. SAEGMULLER CO., ROCHESTER, N.Y. 6451.” On the telescope is a label stating EMR Inventory No: “633 024595, 6675-66-666-6666. EMR is the abbreviation for the Department of Energy Mines and Resouces, the prior name of the Department of Natural Resources
The theodolite is stored In a wooden box marked ” T.Cooke & Sons, Ltd. Markers of Astronomical, Surveying and Drawing Instruments & c…. , London , York & Cape Town.”
The theodolite appears in the 1907 catalogue ” Astronomical & Engineering Instruments, Bausch, Lomb, Saegmuller Co. of Rochester, NY. USA ” – see the image above of page 39 showing the theodolite.
The Department of Natural Resources describes this object as an “Astro Transit”. It was used for geodetic surveys at the beginningof the 20th century.
Source of Object: Donated by the Surveyor General Branch, Natural Resources, Canada.
Notes: The Society has only this one in its collection.
References: Visit article Early Geodetic Theodolites were King for additional information.
Description by: Entered by Ed Titanich on December 3, 2024, Gordon Olsson on June 6, 2026.