Skip To Content.
Skip to Page Navigation.
Skip to Page Sub-Navigation.

Sighting Vanes
Used to determine straight lines of sight.

EDUCATION

Information for the 2013 Save Texas History Symposium coming soon.

Plumb Bob / Jacob Staff Mount
The plumb bob is used to center a surveying instrument over a specific point. The Jacob Staff mount is used to attach a surveying instrument to a staff or pole.

The Land Office		Site Map		Policies		Contact Us
Copyright 2012 The Texas General Land Office 1.800.998.4GLO (4456) www.savetexashistory.org