Before Elton Gish there was Jack Tod. A very smart dude, and this book shows it. This 180 page book is crammed full of history on all of the porcelain insulator makers, information on hundreds of patents, photos, machine drawings, manufacturing methods and more. This book was printed in 1977 and is signed by the author. It is in excellent condition except for a bit of freying on the binding. A tough book to find in this kind of condition and a must for a serious porcelain collector. My price is $10 plus $3 media mail shipping.