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Year: 1931

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Apparatus and Supplies for Chemistry and Physics

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Apparatus for the Photo-Electric Measurement of Submarine Illumination assembled for the U.S.A. Research Ship Atlantis

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The Canadian Surveyor

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The Cenco Hyvac: High Vacuum Rotary Oil Pump

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Clearance Sale List No. 13 of Discontinued Items, Shopworn Samples, Some Usable Apparatus Not Passing Our Inspection, and An Assortment of Reagents

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Collected Scientific Papers of William Henry Dines

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Condenser and Carbon Microphones: A Discussion of the Construction and Transmission Characteristics of Condenser and Carbon Microphones Used Extensively in Sound Recording for Motion Pictures

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Connections for No. 15 or 17 Controller

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Crystal Control Applied to the Dynatron Oscillator

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Crystal Control Applied to the Dynatron Oscillator

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The Development of the Microphone: An Outline of the Inventions Leading to the Development of the Present High-Quality Microphone

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A Dictionary of Electrical Terms Including Telegraphy, Telephony and Wireless

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