This section is from the book "The Home Cyclopedia Of General Information", by Charles Morris. Also available from Amazon: Home Cyclopedia of Necessary Knowledge.
[L.] The substance of which flint, sand, and sandstone are chiefly composed. It is the oxide of the element silicon, and is very abundant in the form of quartz. Silicates are salts of silica or silicic acid.
 
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