Excerpt from Coking of Illinois Coal in Koppers Type Oven: An Operating Test at the St. Paul Plant of Minnesota by-Product Coke Co. Conducted Jointly by National Bureau of Standards and Bureau of Mines Although the results Obtained are no longer of such urgent value as when the work was planned, yet they constitute an important contribution to the information available regarding the possibilities in the commercial use of the mid-continent coals. They are, therefore, presented for the general information Of those who may be concerned with this important phase of our fuels work. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.