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Radio Inquiry Unit
Radio Inquiry Unit While serving in the U.S. Army during World War I, Armstrong synthesized three ideas to create his superheterodyne circuit for selectively amplifying a very high fr…
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Radio Inquiry Unit
Radio Inquiry Unit According to the E.H. Armstrong, wireless receiving system patent, “The present invention relates to improvements in the arrangement and connections o…
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Radio Inquiry Unit
Radio Inquiry Unit From the Rare Book & Manuscript Library, Columbia University Visit Source Download PDF …
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Hands-on Activity
Skyscrapers Inquiry Unit
Skyscrapers Inquiry Unit Download PDF Skyscrapers Hands-On Activity Prompt for the students: Using only the materials provided, teams of students will design and build a structure as tall as p…
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Multimedia
Refrigerated Rail Car Inquiry Unit
Explore an MDT refrigerator railcar at the Rochester & Genesee Valley Railroad Museum and become aware of the importance of this technological innovation. Witness how the refrigerator railcar prov…
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Multimedia
Refrigerated Rail Car Inquiry Unit
Travel back in time to Despatch, NY, currently known as East Rochester, NY, and discover how the refrigerator railcar aided in the development and growth of an entire village. When Merchants Despat…
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Inquiry Unit
The symbol of growth in China and India of the early 21st century is the proliferation of skyscrapers. This was also the symbol of urbanization in the early 20th century U.S. How did this come about? …
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Primary Source
Skyscrapers Inquiry Unit
English inventor Henry Bessemer’s US patent for the Manufacture of Iron and Steel. Henry Bessemer is well-known for inventing the first process to mass-produce steel inexpensively. This patent, howe…
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Skyscrapers Inquiry Unit
US inventor William Kelly’s US patent for the “Manuf. of Iron & Steel.” Significant debate has ensued over this patent, as a year earlier, in 1856, Henry Bessemer of London, England had ob…
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Skyscrapers Inquiry Unit
Ryerson and Burnham Archives, The Art Institute of Chicago – "The Home Insurance Bldg. was the first of the tall fireproof buildings to be erected in the West,” states Jenney, William Le Baron in…
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