Excerpt from Direct Solar Radiation on Various Slopes From 0 to 60 Degrees North Latitude Solar energy is by far the most important climatic factor. There are many situations in which accessible information concerning solar intensity might be used. For example, it is a significant parameter in ecological problems dealing with silviculture. 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.