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  • All fields: Assaying
(91 results)



Display: 50

    • Assaying, cupeling

    • Men work in an assay office, probably in Colorado. Shows an assayer pouring ore into a cupel over a stove. Shows barrels, sacks, sifters, tins, mortars and pestles, tongs, and graduated sizes of cupels in the laboratory.
    • Jackson, William Henry, 1843-1942.
    • [1897?]
    • Assaying

    • View of a laboratory in an assay office, probably in Colorado. One man sits at a counter to measure ore samples, another man with a pipette and beaker stands near a wood stove. Shows various ore measuring equipment, including a button-balance...
    • Jackson, William Henry, 1843-1942.
    • 1897
    • Assaying

    • Assayers work in a lab probably in Colorado. Beakers, a stove, funnels, and other lab equipment are in the room.
    • Jackson, William Henry, 1843-1942.
    • 1897
    • Laboratory at Colorado School of Mines

    • Interior view of probably an assaying laboratory at the Colorado School of Mines in Golden (Jefferson County), Colorado. Shows an oak workbench with drawers and cabinets and probably a tile top. Bottles, glass funnels, and a mortar and pestle are...
    • McClure, Louis Charles, 1867-1957.
    • [between 1915 and 1920?]
    • Assaying

    • Assayers work in a lab probably in Colorado. A stove, mortars, pestles, tongs, and other equipment are in the room.
    • Jackson, William Henry, 1843-1942.
    • 1897
    • Harrison Ave

    • View south on Harrison Avenue in Leadville, Colorado, is of a busy dirt street lined with wood frame false fronts and telegraph or telephone poles. Horse-drawn flatbed and covered wagons fill the street and pedestrians walk on the boardwalks. The...
    • Wakely, George D.
    • [1879]
    • Assay office interior

    • Interior view of an assay office and laboratory in Cripple Creek (Teller County), Colorado. Shows laboratory equipment, chemical glassware, tools, typewriter, desk, rotating chair, stools, closet, lamps, cabinets, workbench, funnels and a brick...
    •  
    • [between 1890 and 1910?]
    • Assay outfit, Miner's Basin

    • Men use assaying instruments to test Carnotite ore in an outdoor lab in Miners Basin in the La Sal Mountains (Grand County), Utah. One of the men, probably Charles Poulot, is beside a tent in a wooded area.
    • McKee, Thomas Michael, 1854-1939.
    • 1897 August 10
    • Los Angeles

    • Aerial, panoramic view of multi-story brick buildings in downtown Los Angeles, California. Shows the Orpheum Grand Opera House, Italianate commercial buildings, and buildings with domed cupolas, balustrades on cornices, and corner turrets. Signs...
    • Jackson, William Henry, 1843-1942.
    • [between 1895 and 1902?]
    • Colorado School of Mines

    • View of the campus at the Colorado School of Mines in Golden (Jefferson County), Colorado. Shows Samuel Guggenheim Hall, the administration building with a central tower next to the gymnasium with a Mission Style parapet, the assaying laboratory...
    • McClure, Louis Charles, 1867-1957.
    • [between 1915 and 1920]
    • T & B sampler

    • View of the T & B Sampler, Cripple Creek, Teller County, Colorado; shows mine ore processing and assaying facilities with railroad freight cars at the dock.
    •  
    • 1895
    • The Campus, Colorado School of Mines, Golden

    • View of the Colorado School of Mines, Golden (Jefferson County), Colorado. Campus buildings include Samuel Guggenheim Hall, Gymnasium, Assaying Laboratory & Powerhouse plant, Stratton Hall, and Dean's residence. Young trees border cement sidewalks.
    •  
    • [between 1908 and 1910?]
    • Castle Valley, Utah

    • View of log buildings, a tent, and sagebrush at possibly Castleton in Castle Valley (Grand County), Utah. Parriott Mesa, Castle Rock, and Priest and Nuns rock formations are in the distance. A sign on a building with a grass roof reads, "General...
    • McKee, Thomas Michael, 1854-1939.
    • [between 1902 and 1910?]
    • School of Mines and Golden, Colo.

    • Aerial view of the Colorado School of Mines and downtown Golden (Jefferson County), Colorado. Shows Samuel Guggenheim Hall, the administration building with a central tower next to the assaying laboratory and powerhouse plant with a tall...
    • McClure, Louis Charles, 1867-1957.
    •  
    • Stratton Hall

    • Stratton Hall, Colorado School of Mines, Golden, Colorado, named for mining millionaire Winfield Scott Stratton; features brick and stone construction and Mission style curvilinear parapets; several students on stairs of Stratton's entry; Assaying...
    • McClure, Louis Charles, 1867-1957.
    • [between 1905 and 1908]
    • West Creek - Pemberton

    • View of Pemberton, Teller or Douglas County, Colorado; shows tents, frame houses, and girls on the street. Signs read: "Restaurant," "Wades Bakery," and "Assaying."
    • Poley, H. S. (Horace Swartley)
    • [between 1892 and 1901?]
    • West Creek

    • Three men walk abreast down a snowy street flanked by frame buildings in West Creek, Douglas County, Colorado; a third man stands in the distance. Signs: "Assaying."
    • Poley, H. S. (Horace Swartley)
    • [between 1906 and 1910?]
    • Colorado School of Mines, Golden

    • View of Colorado School of Mines, Golden, Colorado; campus buildings include (center, left to right) Samuel Guggenheim Hall (Administration building built in 1906), Gymnasium (built in 1908), Assaying Laboratory & Powerhouse plant, Stratton Hall...
    • McClure, Louis Charles, 1867-1957.
    • [between 1908 and 1910]
    • Kramer Mines Inc.

    • A man works in an assay office at the Kramer Mine in Salida (Chaffee County), Colorado. Test tubes and chemistry equipment sit on a counter top. The worker wears his shirt sleeves rolled up.
    • Zellers, Bob.
    • [between 1930 and 1950?]
    • 1929 Denver Householders' Directory and Street and Avenue Guide v.5

    • The Denver Householder Directory started in 1924 and has been continued by other publishers right up to the present. These are arranged by address, allowing you to find out who was living in the house and/or the owner or the name of a business.
    •  
    • 1929
    • 1931 Denver Householders' Directory and Street and Avenue Guide v.7

    • The Denver Householder Directory started in 1924 and has been continued by other publishers right up to the present. These are arranged by address, allowing you to find out who was living in the house and/or the owner or the name of a business.
    •  
    • 1931
    • Blackhawk

    • Interior view of the Fifty Gold Mines Corporation assay laboratory, in Blackhawk, Gilpin County, Colorado; shows a man with water hoses and a brick retort furnace; tongs and crucibles are on a table. The bucket is for collecting mercury used in the...
    •  
    • [between 1906 and 1910?]
    • 1926 Denver Householders' Directory and Street and Avenue Guide v.2

    • The Denver Householder Directory started in 1926 and has been continued by other publishers right up to the present. These are arranged by address, allowing you to find out who was living in the house and/or the owner or the name of a business.
    •  
    • 1926
    • Assay laboratory interior

    • Interior view of a mining assay office, in (probably) Colorado; shows a furnace, chemical bottles, beakers, mortars, scales, piled powders, a pouring mold, a dust pan and whisk broom, and label: "Nitric Acid."
    • Walker, William H., photographer.
    • [between 1880 and 1900?]
    • The Real Pioneers of Colorado

    • Transcript of a document originally written by Maria Davies McGrath in 1934. This document contains transcripts of all three volumes, arranged alphabetically by pioneers last name. Within each entry is a brief biography of the individual (s) who...
    • McGrath, Maria Davies, 1865-1951.
    • 1934
    • Mine assay office

    • Interior view of the Fifty Gold Mines Corporation mining assay laboratory in Blackhawk, Colorado; shows balance-scales, a distiller, chemical glassware including beakers, funnels, flasks, alembics, mortars, and bottles labeled: "Nitric Acid." A man...
    •  
    • [between 1906 and 1910?]
    • Climax, Colorado assay laboratory

    • Interior view of a mine assay office in Climax, Colorado; shows a workbench with chemical glassware including funnels, beakers and flasks, an electric fan, and a distiller or gas-generator.
    • Denver Commercial Photo Co.
    • [between 1890 and 1900?]
    • Old Time Assayers Office, Cripple Creek, Colo

    • Interior view of a mine assay laboratory in Cripple Creek, Colorado; shows a brick retort furnace, washtubs, buckets, a shovel, pulleys and drive belts.
    • Sanborn (Colo.)
    • [between 1880 and 1900?]

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