65. Since this instrument is not generally known, an explanation of its usewill be given. It is held with the thumb and fore-finger of the right handwith the large flat face horizontal, and with, the face, 0, two or threeinches from the eye. A flag pole, stick, or convenient tree is located onthe…
Surveying · Theses
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-412-181.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-454-279.webp)
