Training Manual in Topography, Map Reading, and Reconnaissance

Training Manual in Topography, Map Reading, and Reconnaissance

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...miles to l! 910. 0 10 20 30 40 miles. Lesson xxra. MAP REPRODUCTION. 156. The hektograph is one of the most satisfactory means of reproducing maps, drawings, etc., in the field on account of the simplicity of the equipment. Staple compound for hektographs is sold hy Frederick Post Co., Chicago, at 25 cents per pound and the hektograph can he readily made therefrom, or it can be purchased set up from the company. The only apparatus needed is the hektograph and hektograph ink and the paper necessary for impressions. The drawing must be traced with hektograph ink on a paper with a nonabsorbent surface. The drawing is then placed ink side down upon the hektograph and gently rubbed until the ink has thoroughly taken on the hektograph material. This may be determined by lifting one corner of the drawing from time to time. When the transference is completed, impressions are made by laying a piece of paper on the hektograph and rubbing over it when it readily takes the impression. From 30 to 75 readable copies can be thus obtained. When the impressions begin to fail, the original drawing may be again applied to the hektograph, which has been washed off, and a number of additional copies secured. When the work is completed the surface of the hektograph is washed off with light touch of a damp sponge, all ink readily clears, and the hektograph is ready for further work or to be stored until needed. The compound above referred to gives most excellent line impressions and is guaranteed to stand any climatic conditions. The inks come in a number of colors and added value attaches to a field process that will give you in one process reproduction in several colors. Twenty-five readable impressions have been obtained from a sketch made with an ordinary more

Product details

  • Paperback | 54 pages
  • 189 x 246 x 3mm | 113g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236565371
  • 9781236565372