Society of Glass Technology · [Sheffield] · leaf 233
Plate I. /erted portion. Glass surface towardsthe front. Plate II.Separate columns. … Plate III. Plate IV. ad view of prisms. Broken along plane Same as Plate III. Glass surface at bottom,of a cross joint. (Same portion as On right, line of a cross jomt. Plate IV.) [Toface Trans., p. 159. COLUMNAR STRUCTURE IN SANDSTONE BLOCKS. 159 space of a few hours the sandstones which normally…
Glass
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