Page:Popular Science Monthly Volume 89.djvu/670

 Where Germany Gets Her Basalt Paving: Blocks

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��Although basalt wears away rapidly and becomes slippery in wet weather, yet a German company has found it practicable to quarry it in large quantities for paving blocks. The material is quarried in long strips, following the natural lines of its formation, the peculiar construction of which is shown in the photograph below, taken at the quarries at Wilscheidberg. A good workman can make about six hundred blocks in a day

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