Loading/Icing Refrigerated Cars

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Loading/Icing Refrigerated Cars

Refrigerated Rail Car Inquiry Unit

A photo of 3 men loading strawberries into a refrigerated car and a photo of 2 men "icing" a refrigerated car, both courtesy of the Library of Congress. Download PDF Visit Source 1 Visit Sour…

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Refrigerated Rail Car

Inquiry Unit

Refrigerated Rail Car

Some technology is so woven into our lives that we barely notice it. We go about our daily routines without giving it a thought, yet, were it not for these advancements, our routines would be very dif…

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A Pre-History of Radio (Part One)

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A Pre-History of Radio (Part One)

Radio Inquiry Unit

Join historian Alex Magoun on a journey through the history of radio technology from James Clark Maxwell’s theory of electromagnetism to Guglielmo Marconi's use of that theory in long-distance radio…

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A Pre-History of Radio (Part Two)

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A Pre-History of Radio (Part Two)

Radio Inquiry Unit

Continue on the historical journey of the radio industry with historian Alex Magoun as he goes back in time and shares how engineers and scientists improved wireless telegraphy from Morse code to the …

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Commercialization of Broadcast Radio in the Home

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Commercialization of Broadcast Radio in the Home

Radio Inquiry Unit

This video explores the beginnings of broadcast radio in the home, thanks to Pittsburgh’s KDKA radio station and Westinghouse, which made radio receivers. The electromagnetic “magic” found in sm…

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Crystal Radio

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Crystal Radio

Radio Inquiry Unit

Like game consoles and smartphones today, radios in the 1920s were expensive. Fortunately for teens back then, they could build radio receivers using cheap parts found at home and hardware stores. Wat…

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Radio

Inquiry Unit

Radio

The invention of wireless telegraphy-radio-at the end of the 19th century by Marconi and others made it possible to communicate with anyone, anywhere, around the globe. It soon became apparent, howeve…

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Electric Waves by Dr. Heinrich Hertz, 1857-1894

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Electric Waves by Dr. Heinrich Hertz, 1857-1894

Radio Inquiry Unit

Radio Inquiry Unit Electric Waves, Being Researches on the Propagation of Electric Action with Finite Velocity Through Space, by Dr. Heinrich Hertz, 1857-1894. The English translation of Hertz…

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