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Crockery & glass journal (1875)
New York : G. Whittemore & Co. · leaf 20
om sand relatively high in impuri-ties. An excess of the chief impurity, iron, is usuallyavoided in the quarries by a careful selection of thewhitest sand, although the whitest sand is not invari-ably the purest. Repeated washing tends to removethe iron. Magnetic separators also have been… … IO W 00 v© 00 W«3 *o r% II r— II n O Q 03 <-> S3 Cfl <-> Q ffl ■p.,J3 o u 1) Ph > i -5M T rj wtocg — > o - i^a % ■» i *> O.B° cc •? « o ti So.*- <U rt 3■ c3 o o no • a 1) g3c n ^W o o k 4) ea a O U3 00 tN U.QQQ 02 5l CO <-H >< N,, til uj um rj aj 03 •d • o :o cm o…Pottery · Glass · Glassware
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