This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant mark

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the publi

Excerpt from The Gas Record, Vol. 12: July-January, 1918 A certain amount of ammonia is re covered in England from shale distilla tion, and from blast furnaces