Excerpt from Features of Producer-Gas Power-Plant Development in Europe The experiments made by Mr. H. Hall in 1890, 1892, and 1893 on a larger scale, and in shafts of mines, appear to be conclusive in the same sense, although they show that an explosion is not a certain consequence of every shot that blows out or emits flame, but depends on many circumstances affecting the condition and quantity of the dust, the nature and strength of the explosive, the size of the galleries or shafts, etc. The Prussian commissioners reported that if absolute immunity from blown-out shots could be obtained, the dangers which are brought about by coal dust would be almost entirely prevented. In their experiments they found that no shots, other than a blown-out Shot, caused an explosion of the dust. 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.