Helderberg Portland Cement
View of the Helderberg Portland Cement Quarry near "Howes Cave" (Howe Caverns) in Cobleskill, Schoharie County.
Identifier: NYSA_A3045-78_10123
Date: 1924
Repository: New York State Archives
Source: New York State Archives. Education Dept. Division of Visual Instruction. Instructional lantern slides, 1911-1925, A3045-78, neg. 10123.
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