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Title
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Planimeter
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Format
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photograph: print
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Description
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G. Coradi planimeter for determining areas and volumes for excavation or fill. Labeled “Planimenter No. 1, Dept. of Civil Engineering (Room 213 Thomas Lab.)”
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Title
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Microscope, brass eyepiece
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Format
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photograph: negative
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Description
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Eyepiece in screw-top case, about 2″ high, 1″ diam. Bausch & Lomb Optical Co.
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Title
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Traveling wave tube
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Format
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photograph: negative
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Description
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This item is a long, thin glass tube with a larger cylindrical end. The thin part contains what looks like a coiled spring. The spring is attached to a copper base and some wires in the thicker end. Original wrapping labeled by Mendenhall: “Traveling wave tube/J.R. Pierce ’33/R. Kompner.”
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Title
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Potentiometer, low resistance standard
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Format
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photograph: negative
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Description
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Model no. 7521. Also called a resistance box. Wood, brass fittings. Ink circuit diagram inside separate top. Original inventory card on file. Mfg. Otto Wolff, Berlin.
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Title
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Calculator, Marchant
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Format
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photograph: negative
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Description
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Patented in 1940-1945. Used extensively in connection with infrared spectrophotometry to solve the matrix of simultaneous equations. Mfg. Marchant Calculators, Inc., Oakland, CA.
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Title
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Wrico lettering set
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Format
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photograph: print
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Description
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Used for drafting. Housed in wooden box.
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Title
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Rolling parallel ruler
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Format
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photograph: print
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Description
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Keuffel and Esser 18″ rolling parallel ruler. Model 1758. Brass construction, encased in wooden box.
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Title
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PIR-1 (Mk146) fuze
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Format
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photograph: negative
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Description
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For 5.0″ aircraft rocket and 7.2″ demolition rocket. 6.17″ long. Steel and brass, aluminum alloy arming plunger, copper diaphragm. Two models were made, Model 0 and Model 1. About 44,000 Model 0’s were manufactured by Caltech. About 12,000 of these were delivered to the army for use in the 7.2″ demolition rocket. The remainder went to the navy for use in the 5.0″ aircraft rocket. “A”: cutaway; “B”: complete, stamped Mk146, but slightly different from 9A.
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Title
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PIR-9 fuze
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Format
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photograph: negative
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Description
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For 11.75″ aircraft rocket. 6.84″ long. Steel and aluminum alloy. Designed as an improvement to the PIR-2 by upgrading strength, sensitivity, and performance at oblique impact, safety, and ease of loading. Had as a companion PIR-14 for use in 5.0″ HVAR. PIR-9 development was halted when it was discovered that the PIR-19 (Mk163) offered sufficient improvement with less radical modification.
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Title
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Microscope in wood box
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Format
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photograph: negative
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Description
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Mfg. Spencer Lens Co., Buffalo, NY. Two extra eyepieces. Belonged to Edward Hughes.
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Title
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Ion chamber
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Format
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photograph: negative
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Description
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Instruments like this used in India (1936 and 1940), Canada (1937), and the US (1936-38, 1940, 1946). This one, No. 14, used to correlate measurements made in the 1930s with those made in 1950s and 1960s with the pulsar-type chamber. Mfg. CIT Physics Shop.
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Title
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Integrator
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Format
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photograph: print
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Description
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G. Coradi of Zurich integrator/planimeter for determining areas and volumes for excavation or fill. Housed in mahogany box.
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Title
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Oxygen meter, Pauling, Model K
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Format
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photograph: negative
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Description
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Serial no. 2. Wood box, handle on top. On/off switch on front; dial lacking indicator card. Mfg. F&P Co.
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Title
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Hydrogen lamp power supply, Model B
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Format
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photograph: negative
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Description
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Serial no. 40079. Part of ultraviolet accessory kit for DU spectrophotometer. Mfg. Beckman Instruments, South Pasadena, CA.
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Title
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Pyrometer, Wanner no. 2385
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Format
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photograph: negative
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Description
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Has original calibration card. Mounted on wood base. Used to measure temperatures. Mfg. Wanner, Germany.
