MINNESOTA: IRON MINE, 1941. Miner standing at at one end of the Hull-Rust-Mahoning iron pit
MINNESOTA: IRON MINE, 1941.
Miner standing at at one end of the Hull-Rust-Mahoning iron pit. The open pit is two and a half miles long, three quarters of a mile wide and about four hundred feet deep, one of the largest open pit iron mine in the world, near Hibbing, Minnesota. Photograph by John Vachon in August 1941. From the Farm Security Administration
CRYSTAL PALACE, 1851. Queen Victoria, left, opens the Great Exhibition, the first
CRYSTAL PALACE, 1851.
Queen Victoria, left, opens the Great Exhibition, the first international industrial exhibition, at the Crystal Palace in Hyde Park, London, England, May 1851. Contemporary English lithograph
1851, Admiration, Architecture, Building, Carousel Collection, Ceremonial, Ceremony, Crowd, Crystal Palace, England, English, Exhibition, Exposition, Glass, Great Exhibition, Hyde Park, Inauguration, Industrial, Interior, International, Iron, Lithograph, London, May, Middle, Opening, Palace, Queen, Upper Class, Victoria, Victorian
TELEGRAPH, 1832. Joseph Henrys signal telegraph apparatus of 1832, consisting
Joseph Henry's signal telegraph apparatus of 1832, consisting of an electromagnet, a steel bar mounted on a pivot, and a bell. Wood engraving, American, 1888
1832, American, Apparatus, Bar, Bell, Book, Coil, Early, Electric, Electromagnet, Engraving, Henry, Idea, Invention, Iron, Joseph, Magnet, Pile, Relay, Science, Signal, Telegraph, Wire