The official authorized flags of the U.S. Coast and Geodetic Survey first selected in 1899.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

Suggested C&GS flag design prior to selection of official flag.

The status of world-wide geodesy as of circa 1901 during the tenure of Henry Pritchett as Superintendent of the Coast and Geodetic Survey.

Principal arcs measured and in progress on the North American continent during the tenure Henry Pritchett as Superintendent of the Coast and Geodetic Survey.

Cover page to advertising brochure for Submarine Signal Fathometer - Visual Echo Sounding.

Cartoon showing use of Submarine Signal Fathometer with components and concept.

Diagram of components of Submarine Signal Company Fathometer

Picture of Coast and Geodetic Survey Ship SURVEYOR which had been equipped with Submarine Signal Company visual Fathometer. Text notes that the very first operational Fathometer was installed on the Coast and Geodetic Survey Ship LYDONIA in 1924.

1927 advertising brochure for Submarine Signal Company Fathometer.

Leveling work in the Nevada desert.

Looking for a mark during leveling operations in the Nevada desert.

Rear rodman hustling to become forward rodman during leveling operations in the Nevada desert.

Oscar Risvold conducting reconnaissance for triangulation work in western states.

Oscar Risvold conducting reconnaissance for triangulation work in western states.

A different mode of transportation for level crew in the Nevada desert.

Home sweet tent for a geodetic survey crew somewhere in the western states.

Survey crew with pie and ice cream in camp. Note C&GS flag and American flag behind surveyors.

Wash day for a C&GS leveling crew somewhere in the American southwest.

Level crew with good-natured burro.

Carl Risvold while on level crew.

Level crew with velocipedes making only available shade.

Level crew somewhere in Nevada.

Level crew doing tourist-stuff on a yucca tree.

Lightkeepers camp.

Member of level crew posing with a good-natured burro.

Level crew at work in the desert.

Letter from Charles Pierce to Floyd Risvold detailing work. Page 1.

Letter from Charles Pierce to Floyd Risvold detailing work. Page 2.

Letter from Bill Husemeyer to Floyd Risvold detailing funding woes and operational woes. Page 1.

Letter from Bill Husemeyer to Floyd Risvold detailing funding woes and operational woes. Page 2.

Letter from Henry ___ to Floyd Risvold discussing end of large-scale C&GS work during the depression years. Page 1.

Letter from Henry ___ to Floyd Risvold discussing end of large-scale C&GS work during the depression years. Page 2.

Rock outcrop with rectangular patterns in the Aleutians.

Scenery at Dutch Harbor.

Model airplane under construction in the Petty Officers' lounge on the PATHFINDER.

Ice, rock, and ocean at Dutch Harbor.

A concrete fortification at Dutch Harbor.

Mount Ballyhoo.

A view of the Army base.

A view of the Army base.

PATHFINDER at the dock at Dutch Harbor.