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No Caption: c. 1910. Side view of a heavy coastal defense disappearing gun. 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: 1910
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Caption: "Eagle River D. & R. G. R. R," c. 1923. Denver and Rio Grande Western Railroad tracks run next to the Eagle River at the bottom of a canyon in this photograph. A wall of timber shores up part of one side of the canyon wall in the distance. The Denver and Rio Grande (D&RG) primarily operated railroad lines between Denver, Colorado and Salt Lake City, Utah, with other lines stretching into New Mexico.
Date: 1923
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Caption: "Agricultural Building, Portland Fair, 1905." View of the Agriculture and Horticulture Building at the Lewis and Clark Centennial Exposition. The exposition was held in Portland, Oregon from June 1st to October 15th, 1905. It celebrated the one-hundred year anniversary of the exploratory expedition of the Louisiana Purchase and what became the northwestern part of the United States, led by Meriwether Lewis and William Clark. Some 1.6 million people visited the fair, viewing exhibits from twenty-one countries.
Date: 1905