The Glass Insulator In America. by N. R. Woodward The Glass Insulator In America. by N. R. Woodward this 1969 Report, has 88 pages of insulator information, plus patent info and pages of known at the time insulator profiles by CD. it is a must have for an insulator library. The book is in good used condition... $10 plus postage... Don't wait for a sale, it's not going to happen. ** REMEMBER No Buyers premium to pay!!!! NO Bidding!!!!