Vol. LXIX No. 27. A YEAR. WEER LT. THE BONTA PLATE GLASS ANNEALING OVEN. 4, scientific american, 1893-12-30

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Vol. LXIX No. 27. A YEAR. WEER LT. THE BONTA PLATE GLASS ANNEALING OVEN. 4, scientific american, 1893-12-30

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