Food cache between Anchorage and Fairbanks. Triangulation party of William M. Scaife

On the trail of the observing party. After a fall storm. Triangulation party of William M. Scaife

Camping between two fires without bedding. These guys were tough. Triangulation party of William M. Scaife

Meat for dinner - sometimes the surveyors had to hunt their own food. Triangulation party of William M. Scaife

Station Clear before the storm. Triangulation party of William M. Scaife

Lightkeeper's camp at Station Clear after the storm. Triangulation party of William M. Scaife

The two views of Station Clear. Triangulation party of William M. Scaife

The lightkeeper's camp at Station Chulitna. Triangulation party of William M. Scaife

Camp on the side of Mount Cote. Triangulation party of William M. Scaife

Camp in the trees. Triangulation party of William M. Scaife

The building party camp at Crowley. Triangulation party of Carl I. Aslakson

Office trailer and camp at Alexandria. Triangulation party of Carl I. Aslakson

Camp at Alexandria - observing arc between Eunice and Rustun, Louisiana. Triangulation party of Carl I. Aslakson

The bridal suite - the Tryon's home for the first year of marriage. Triangulation party of Carl I. Aslakson

Walter J. Bilby's trailer at Crowley. Trailer camps began replacing the great tent camps in the mid-1930's. Triangulation party of Carl I. Aslakson

Ray Tryon on the front porch of his first married home. Triangulation party of Carl I. Aslakson

Taking the train to nowhere. Taking a day off in Coffeyville Triangulation party of Carl I. Aslakson

Cleaning up after a tornado hit the camp in Columbus. Carl Aslakson later wrote that this cleared his inventory of long-lost items. Triangulation party of Carl I. Aslakson

Another tornado - this one in South Dakota. Carl Aslakson later wrote that this cleared his inventory of long-lost items. Triangulation party of Carl I. Aslakson

Having a little cheer on a day off in Willmar. Triangulation party of Carl I. Aslakson

Camp at the end of the line - Carl Aslakson ran a tight ship. Triangulation from Louisiana to the Canadian border in 1934. Triangulation party of Carl I. Aslakson

Camp at the end of the line - Carl Aslakson ran a tight ship. Triangulation from Louisiana to the Canadian border in 1934. Triangulation party of Carl I. Aslakson

The camp at Alva. Triangulation party of Carl I. Aslakson

Still a lot of tents but more and more trailers. The camp at Benjamin Triangulation party of Carl I. Aslakson

An all trailer camp - date and time unidentified. The days of the tent camps in the Lower 48 were over.

Comparison between tent camps and trailer camps. An overnight innovation - trailers became the only way to go in 1935. Triangulation party of Carl I. Aslakson

Shorty and Novak at rest waiting for night observations. Camp on Gulf of Mexico

Camp on the Porcupine River

Camp on the Porcupine River

Astro camp at Pop Lake, Alaska

Camp at Wide Bay, Alaska

Taking a shower - Alaska style

Bear bait - sometimes this was the best that could be done for a camp

Birdseye view of an orderly campsite

Bob Pryce - the well-dressed field man

Camping in the mountains

Camping in the bush

Waiting for dinner at the end of a long day

Camp in the thickets

Camp at Bettles, Alaska. Just above the Arctic Circle

Camp at Bettles, Alaska. Just above the Arctic Circle

Camp haircut at Pop Lake

Beach erosion studies. As property values increased, beach erosion studies became important. Raymond Stanton Patton, Director of C&GS 1929-1938, was a pioneer in this field

Beach erosion studies. As property values increased, beach erosion studies became important. Raymond Stanton Patton, Director of C&GS 1929-1938, was a pioneer in this field

Tsunami inundating Hilo, Hawaii. Note man on pier. This disaster provided impetus for C&GS to establish tsunami warning system

Tsunami warning station established at Dutch Harbor, Alaska. Many warning stations established at permanent tide station installations

Time lines for tsunami paths from various epicenters to Hawaii.

Earthquake uplift at McLeod Harbor, Montague Island. C&GS surveys followed Good Friday Alaska earthquake of 1964. 31 feet of uplift necessitated resurveys of many areas. Investigations off of HODGSON

Current buoys with lights, radar reflectors, and F.M. transceivers. C&GS surveys followed Good Friday Alaska earthquake of 1964. Current surveys conducted with hydrographic surveys. Investigations off of HODGSON

Landslide scar at Hanning Bay. C&GS surveys followed Good Friday Alaska earthquake of 1964. Earthquake triggered landslide in Hanning Bay. Investigations off of HODGSON