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One of 65 copies, this being copy 43, made and distributed by the Office of Scientific Research and Development. Covers lightly worn at edges; spot of soiling on rear cover. Interior unmarked and generally clean. Includes four pages of photographs of equipment (on glossy paper), six pages of mechanical diagrams, and 35-pages of statistical graphs. [137] pages, each printed on one side. 11 x 8.5 inches. No institutional copies located on OCLC. Rare. Confidential WWII-era technical report on the testing of anti-tank land mines, including the German Tellermine. The report details the results of measuring of the dynamic characteristics of the mines when subjected to shock impulses, including drop weight and blast tests, essential to the comparison of various methods of clearing mine fields in which mines were detonated by means of the shock impulse from blast waves, flails, etc. The research was conducted by the contractor, the Gulf Research & Development Company, Pittsburgh, Pennsylvania. ''It is the ultimate object of this investigation to obtain an indicator mine. Such an indicator mine is useful in comparing the relative effectiveness of various methods of clearing land mine fields. The German Teller mine TMi-43 is known to be the most difficult to explode by blast. Engineering data were provided the Engineering Board on the basis of which this German mine was substantially duplicated. This mine is known as the TMi-43 Indicator Mine'' - from the comments of the NDRC Project Supervisor, Semi Joseph Begun (1905-1995). [Begun was a German-American engineer and inventor who was, at the time, the Vice President of Research for the Brush Development Company, Cleveland, Ohio.] The report was submitted by Thomas Bardeen and A. P. Palmer. Thomas Bardeen (1912-1980) was a Pittsburgh resident and engineer with Gulf. He received the President's Certificate of Merit on November 30, 1948, for his contributions to the war effort. The mines tested were the M1B1, M1A2, M4, TMi-42, TMi-43, T6E1, C.I. (Canadian Indicator) and the T6-43. Seller Inventory # 015766
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