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21. Induction heating high temp, bldg 39

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: April 8, 1960
Institution:: National Archives at Boston

22. Magnaflux test of 3" AA tube

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: March 9, 1939
Institution:: National Archives at Boston

23. Man and machine

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1942–1959]
Institution:: National Archives at Boston

24. Mass spectrometer

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1942–1959]
Institution:: National Archives at Boston

25. Mounted 75-MM composite extension ready for test

Creator:: U.S. Army Materials and Mechanics Research Center. Public Affairs Office; Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1908–1984]
Institution:: National Archives at Boston

26. Physical testing laboratory

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1939–1959]
Institution:: National Archives at Boston

27. Proposed building for testing laboratory

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: May 24, 1919
Institution:: National Archives at Boston

28. Recording apparatus used to record strains and pressure 76 MM gun tube TI 2

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: April 28, 1943
Institution:: National Archives at Boston

29. Rodman gun during testing at Ft. Monroe, Virginia

Creator:: U.S. Army Materials and Mechanics Research Center. Public Affairs Office
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1977]
Institution:: National Archives at Boston

30. Section of mechanical testing area

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1959–1962]
Institution:: National Archives at Boston

31. Sellers-Emery 100000, universal horizontal testing machine

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: March 14, 1940
Institution:: National Archives at Boston

32. Test lab machine shop

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: May 1919
Institution:: National Archives at Boston

33. Test lab machine shop

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: May 1919
Institution:: National Archives at Boston

34. Test set up for redeye motor casing burst tests

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1959–1962]
Institution:: National Archives at Boston

35. Two men testing machines

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1942–1959]
Institution:: National Archives at Boston

36. Typical instrumented test model

Creator:: U.S. Army Materials and Mechanics Research Center. Public Affairs Office; Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1967–1984]
Institution:: National Archives at Boston

37. United States Testing Machine designed by A.H. Emery, 1875

Creator:: U.S. Army Materials and Mechanics Research Center. Public Affairs Office
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1977]
Institution:: National Archives at Boston

38. United States Testing Machine designed by A.H. Emery, 1875

Creator:: U.S. Army Materials and Mechanics Research Center. Public Affairs Office
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1977]
Institution:: National Archives at Boston

39. Woman and two men testing machine

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1942–1959]
Institution:: National Archives at Boston

40. 1,000,000 lb capacitiy extrusion press

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1942–1959]
Institution:: National Archives at Boston