Excerpt from Flammability Reduction Comparisons of Four Forest Fire Retardants 100 ft? Ponderosa pine needles 1981 485 485 387 396 479 332 376 936 554 987 604 573 027 016 937 562 Untreated Aspen excelsior 1981 502 551 500 558 577 039 023 503 622 836 989 820 817 021 012 995 795 Untreated 1 50 738 Averages. 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.