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OLSEN TESTING MACHINES AND INSTRUMENTS, BULLETIN NO. 4; THE HERBERT PENDULUM AND "CLOUDBURST" MACHINE FOR HARDNESS TESTING AND SUPERHARDENING OF METALS
Philadelphia, PA: Tinius Olsen Testing Machine Co., 1929. Soft cover. Very good plus. Item #52944
24 pages with illustrations and information on the Pendulum Hardness Test and the Olsen "Cloudburst" hardness testing machines. Graphs and tables. Bound in black card covers lettered in gold. Letter on the Tinius Olsen stationery signed by the vice president laid in. A very good plus copy.
Price: $30.00
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Metal Work, Tools, & Machinery