Answered By: Ken Burns
Last Updated: Jul 19, 2016     Views: 6

This book by Kummel may have information that is useful:

Kümmel, Henry Barnard, 1867-1945. The glass-sand industry of New Jersey. By Henry Kümmel and R. B. Gage. Trenton, NJ : Geological Survey, 1907. p.77-95.
Part II of : Annual Report of New Jersey Geological Survey, no. 43, for 1906. Xerox copy. Bound with Part 3...Molding sands; Part 6...Fire brick and clay industry. Iron mining industry and with Part 2 of the 1900 Annual Report...Portland cement industry.

Attached is a list of books available in the Rakow Library relating to glass sands.