Excerpt from The Ventilation of MinesEnlargement of air-courses and splitting of the air-currents have been recommended as the most suitable mode of increasing the amount of ventilation, as well as the most economical means of distribution. Hitherto splitting of air has not been much resorted to in Scotland, although in other mining dis tricts it has been found to be the chief improvement in oh taining increased quantity.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.