Mulholland's Bicentennial Edition of MOST ABOUT GLASS INSULATORS This used 1976 edition at the time was a complete reference book on Glass insulators with early photographs and line drawings. 456 pages and hard bound make this a excellent reference book for your library...$10.00... Plus postage. Don't wait for a sale, it's not going to happen. ** REMEMBER No Buyers premium to pay!!!! NO Bidding!!!!