Geological Survey. Washington, D.C., Mar. 13. The offset camera making and copying maps, charts, and diagrams. This is used to change the size and makes the different plates for the different colors used on the maps

Geological Survey, Dept. Interior. Washington, D.C., Mar. 13. E.A. Shuster working with the erocartograph constructing topographies from airplane pictures

Geological Survey. Washington, D.C., Mar. 13. Lithographic draftsmen correcting the printing plates at the Dept. of Interior Geological Survey Section

Washington, D.C., Mar. 13. H.C. Yates with the process printing frame printing direct from negative to metal plate. At the geological survey

Press room where all maps and charts are printed for the Coast and Geodetic Survey

Making prints for $3,000,000 map. Grover M. Plew, AAA laboratory worker, making the finished photographic prints which go into the finished map now being put together by the AAA. Approximately one-third of the entire land surface of the United States is being photographed from the air for the map. 7

Testing airplanes lenses used in map making. Washington, D.C., May 6. Dr. F.E. Washer of the U.S. Bureau of Standards testing the lens for the airplane cameras that are used by the Army and Navy. There are lights in the rear of the columnmeters and exposures are made on the photographic plate in fro

Geological Survey. Washington, D.C., March 13. Albert Pike using a stereoscope on a pair of photographs to bring out the relief and locate objects for a map

Uncle Sam spending $3,000,000 to make one map. Washington D.C. July 28. A huge photographic map which when completed will have cost $3,000,000, is being put together by the Agriculture Adjustment Administration, Department of Agriculture, in Washington. Approximately one-thrid of the entire land sur