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Search Results 5501 to 5510 of 6929
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Caption: "Balboa Park, San Diego, Calif. May 19, 1934." View of an artificial lagoon in San Diego's Balboa Park, with the Panama-California Exposition's Commerce and Industries Building (tower at left, now called Casa de Balboa) and the Foreign Arts Building (tower at right, now called the House of Hospitality).
Date: 5/19/1934
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Caption: "12" Disappearing Gun," c. 1915. Looking up at the undercarriage of a 12" disappearing gun aimed over a high parapet. Retracting or disappearing guns were a form of artillery developed in the nineteenth century in which heavy artillery guns were placed on rotating carriages that allowed retraction of the weapon after firing, to enable reloading while under enemy fire.
Date: 1915