File:Armour engineer (1910) (14761661036).jpg

Identifier: armourengineer02armo (find matches)
Title: Armour engineer
Year: 1910 (1910s)
Authors: Armour Institute of Technology
Subjects:
Publisher: Chicago : Armour Institute of Technology
Contributing Library: Paul V. Galvin Library, Illinois Institute of Technology
Digitizing Sponsor: CARLI: Consortium of Academic and Research Libraries in Illinois

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ne was drawnthrough the station from which the notes were to be plotted,and the center point of the protractor was placed over thestation. After sticking a pin through the center of the pro-tractor and through the station, the former was left free to re-volve about its center. Now, when the zero mark on the pro-tractor coincides with the line drawn south from the station,the scale reads south or zero azimuth. By turning the pro-tractor to the right about its center until the circle graduationon the protractor corresponding to the azimuth of the shot tobe plotted coincides with the south line, the zero mark on theprotractor points in the direction of the azimuth of the shot,and it is only necessary to mark the point on the paper at theright distance on the scale. The shot is marked with a pointin a small circle, and the shot number is noted together withits elevation and any descriptive remark, such as foot ofslope, waters edge, etc., for which appropriate abbrevi-ations were provided.
Text Appearing After Image:
Jan. 1910) DEAN : A TOPOGRAPHICAL SURVEY 93 The draftsman and one helper were able to reduce about300 side shots per hour and to plot about 150 shots per houron the map. For the draftsman working alone, the time wasof course more than doubled. When the shots were all plotted, the property and fencelines, houses, barns, roads, railroad lines, etc., were drawn inwith the aid of the note books, sketches, and remarks, and thecontour lines of five-foot interval were sketched in. This workwas first penciled in detail, and later inked in.

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