The Line Between Sandstone and Quartzite
Unintentional Double Monumentation
State Surveys of the Great Depression
The Making of a Better Monument
Rocky Mountain High
NGS Celebrates 200th Anniversary
$250 Fine or Imprisonment for Disturbing This Mark
End of the Line
Monument Memorials
Henry Gannett
Illegal Fences of the Great Plains
Survey or No Survey: The Unlicensed Land Surveyor
Invar - The Breakthrough for a Low Expansion Alloy
The Missouri River Commission Survey
Sacred Mountain
The Early Vertical Datums of the U. S. Geological Survey
The McShane Corner
The Pole of Inaccessibility
When Bench Marks and Section Corners Collide
Meades Ranch Triangulation Station
Talbert Abrams - The Father of Aerial Photography
Comparing Two Brickkilns
The Gold Tree
Short Cut Method
True Elevation of Black Elk Peak
Cast Iron Monument of the 6th P.M.
Survey Valley
Discovery on Grizzly Peak
(Articles by Jerry Penry)
The Harrison Marker Company
Monumenting the Northern Terminus of the 6th Principal Meridian
The Father of Government Map Making
Climbing to the Summit of Inyan Kara Mountain
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© Jerry Penry 2018