Excerpt from Collecting Maple Sap With Plastic Tubing Although laboratory tests show higher carrying capacity for laterals on steeper slopes, in practice more than 50 taps are rarely installed on a line. This is because of the difficulty of taking down, cleaning, and reinstalling large rolls of tubing. A 50-tap roll is about as large a roll as an operator would want to handle. This should not be a limiting factor for operations where the tubing is left hanging; in these, the operator should use the full carry ing capacity of the -inch tubing on steeper slopes. Leaks in lateral lines cause the loss of both natural and artificial vacuum and result in low sap yields. Most leaks are caused by failure to push the tubing over the collar of the fitting and can be corrected easily (fig. Per sistent leaks at junction points or at joints subject to heavy tension can be corrected by the use of clamps. 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.