Excerpt from Three Reports on the Use of the Steam Coals of the "Hartley District" Of Northumberland in Marine BoilersThe mere passing of the gases unmixed with air through a mass of incandescent fuel will not destroy the smoke, or if they be so mixed, still, in passing through the fuel, carbonic oxide will generally be formed, and thus a loss of heat will be evolved although visible smoke be prevented. This is attempted to be met, in some cases, by the introduction of fresh air to the gases after passing through the fire.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.