Affichage de 726 résultats

Items consist of two negatives, one original print and three copy prints of the duct system. Title is taken from the subject matter of the photograph;The underground conduit/duct system was initiated in 1910 so that the City's distribution system, within the downtown commercial areas of Sections 15 and 16, could be placed underground before the roads were paved (see the 1912 annual report);The 12-way duct system was constructed of clay and generally housed several cables for different sources;Illustrated in W. E. Hawkins, "Electrifying Calgary", pg 89;#179 in original albums (see artifacts list);35mm negatives located in Box 03, Bay 222, Shelf 05

Items consist of one negative, one original print and one copy print of the duct system. Title is taken from the subject matter of the photograph;The underground conduit/duct system was initiated in 1910 so that the city's distribution system, within the downtown commercial areas of Sections 15 and 16, would be placed underground. The fibre ducts replaced the clay ducts because they were much easier to assemble and install;35mm negative located in Box 03, Bay 222, Shelf 05

Items consist of one negative, one original print and one copy print showing overhead distribution lines. Title is taken from the subject matter of the photograph;35mm negative located in Box 03, Bay 222, Shelf 05

Items consist of one negative and one damaged copy print of the overhead distribution lines. Title is taken from the subject matter of the photograph;35mm negative located in Box 03, Bay 222, Shelf 05

Items consist of one negative, one original print and one copy print showing overhead distribution lines. Title is taken from the subject matter of the photograph;35mm negative located in Box 03, Bay 222, Shelf 05

Items consist of one negative, one original print and one copy print of overhead distribution lines. Title is taken from the subject matter of the photograph;35mm negative located in Box 03, Bay 222, Shelf 05