Society of Glass Technology · [Sheffield] · leaf 233
; also they are intersected at more orless regular intervals by transverse or cross joints, so that ondisintegration the sandstone tends to break up into short columnsfive or six inches long, some of which are regularly prismatic,others tapering off to a point coincident with the plane of a… … Plate I. /erted portion. Glass surface towardsthe front. Plate II.Separate columns.
Glass
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