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  • All fields: retorts
(105 results)



Display: 50

    • Plant of the Index Shale Oil Co., (Brown Retort), near De Beque

    • View of the Index Shale Oil Company extraction facility near De Beque (Mesa County), Colorado; men pose by retorts and shed roofs. The Roan Cliffs are in the distance.
    • Index Oil Shale Company--1920-1930.; Oil-shale industry--Colorado--De Beque--1920-1930.; De Beque (Colo.)--1920-1930.; Roan Cliffs (Utah and Colo.)--1920-1930.; Industrial facilities--Colorado--De Beque--1920-1930.; Petroleum industry--Colorado--De...
    • [between 1920 and 1930?]
    • Science classroom

    • Scientific equipment fills the interior of this classroom at the University of Colorado at Boulder. An optical bench tops glass fronted cabinets, equipped with lenses, prisms, lamps, and filters. Glass retorts and alembics are on shelves;...
    • Boulder (Colo.)--1880-1890.; Classrooms--Colorado--Boulder--1880-1890.; Interiors.; Universities & colleges--Colorado--Boulder--1880-1890.; University of Colorado (Boulder Campus)
    • 1889
    • Gold retorts, 1,370 oz; value $22,500

    • View of gold 'sponge' from the Hidden Treasure Mine, in Gilpin County, Colorado.
    • Hidden Treasure Mine (Gilpin County, Colo.)--Products--1880-1890.; Gilpin County (Colo.)--1880-1890.; Gold--Colorado--Gilpin County--1880-1890.; Mining--Colorado--Gilpin County--1880-1890.
    • [between 1880 and 1900?]
    • Central City First National Bank, Colorado

    • A map hangs on the wall behind the man in the right midground. A "Checks" window stands in the left midground.; Two men stand near the "Gold" window inside the First National Bank at the corner of Eureka and Main streets in Central City, Colorado....
    • Central City (Colo.)--1900-1910.; Banking--Colorado--Central City--1910-1920.; Banks--Colorado--Central City--1910-1920.; Gold--Colorado--Central City--1910-1920.; Men--Colorado--Central City--1900-1910.; Scales--1910-1920.
    • [between 1910 and 1920?]
    • Chemistry class

    • Chalkboards on interior walls of classroom at the University of Colorado at Boulder have the periodic table of the elements and formulae drawn on them. A workbench has alembics, bottles, and retorts on it. Part of the bench features a glass...
    • Boulder (Colo.)--1880-1890.; Classrooms--Colorado--Boulder--1880-1890.; Interiors.; Universities & colleges--Colorado--Boulder--1880-1890.; University of Colorado (Boulder Campus)
    • 1889
    • History of Denver

    • Comprehenisve study of the history of the Denver area before, during, and after the founding of the city.
    • Cities and towns--Colorado--Denver.
    • 1901
    • Retort and machinery, Colo. State School of Mines

    • Interior view of machinery and probably an experimental petroleum distillery at the School of Mines in Golden (Jefferson County), Colorado. Shows an elevated tank, machinery, a brick furnace, a steel hood, insulated pipes and steel pipes.
    • Colorado School of Mines--Facilities--1910-1920.; Distillation apparatus--Colorado--Golden--1910-1920.; Golden (Colo.)--1910-1920.; Fire extinguishers--1910-1920.; Interiors--Colorado--Golden--1910-1920.; Machinery--Colorado--Golden--1910-1920.;...
    • [between 1915 and 1920?]
    • Master Property Record Parcel: 0000-05073-022-00

    • This card represents parcel number 0000-05073-022-00 of the Denver Assessor's Office Master Property Records. Each file may contain several cards with different section of the parcel.
    • Real property tax--Colorado--Denver--Records and correspondence.; Real property and taxation--Colorado--Denver--Records and correspondence.; Tax assessment--Colorado--Denver--Records and correspondence.; Real...
    • 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985
    • Master Property Record Parcel: 0000-05194-009-00

    • This card represents parcel number 0000-05194-009-00 of the Denver Assessor's Office Master Property Records. Each file may contain several cards with different section of the parcel.
    • Real property tax--Colorado--Denver--Records and correspondence.; Real property and taxation--Colorado--Denver--Records and correspondence.; Tax assessment--Colorado--Denver--Records and correspondence.; Real...
    • 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985
    • Master Property Record Parcel: 0000-05213-011-00

    • This card represents parcel number 0000-05213-011-00 of the Denver Assessor's Office Master Property Records. Each file may contain several cards with different section of the parcel.
    • Real property tax--Colorado--Denver--Records and correspondence.; Real property and taxation--Colorado--Denver--Records and correspondence.; Tax assessment--Colorado--Denver--Records and correspondence.; Real...
    • 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985

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