Survey of Northern and Northwestern Lakes, Design of Intersection Protractor

Description:

One drawing entitled "Survey of Northern and Northwestern Lakes, Design of Intersection Protractor." Notes beneath the title indicate that the protractor was "Made under the direction of Major W. L. Fisk, Corps of Engineers, U.S.A., and E. E. Haskell, Prin. Asst. Engineer, by Murray Blanchard, Junior Engineer." The plan is drawn in black ink on linen and is dated April, 1904. The drawing was prepared at full scale and shows plan, profile, and cross-section views for the design of a protractor which was used for drawing lake survey charts. Additional notes at the bottom of the title block give the following specifications: "Make bar of steel, graduated arcs of German silver, and other parts of brass. Protractor arms to be nickel plated. Graduate protractors to 1/2 degree and verniers to 1 minute."

Date Issued:

1904-01-01T00:00:00Z

Data Provider:

Detroit Historical Society

Subject Topic:

Measurement, Measuring Tools, Protractors, U. S. Lake Survey, and Army Corps of Engineers

Subject Name:

Fisk, Walter L., Haskell, E.E., and Blanchard, Murray

Format:

Drawing, Technical

Rights:

No Copyright - United States

URL:

http://detroithistorical.pastperfectonline.com/archive/6DE88D84-94D5-4297-87BD-046521355110