Excerpt from The San Dimas Experimental Forest, Glendora, California, 1957 The rainfall measurement program.en the San Dimas Experimental Forest was originally set up with a network of 310 rain gages. Supplementary studies were (made to determine suspected errors in the rainfall sampling system. The nature and cause of the errors were determined, and an improved method of sampling was devised. Additional studies were designed to determine the characteristics of delivery of rainfall to the watersheds. These data are to be used in correcting errors in previously collected rainfall data. During the interim period of study the original network of 310 rain gages was increased to 434. Supplementary studies indicated that rain gages, tilted and oriented according to watershed slopes, gave more accurate samples of rainfall than the original network; hence it was decided to adopt tilted gages. The old sampling system was discontinued as of October 1, 1950, and a network of tilted gages which has been under ehser vation for 3 years, was adepted for future use. These gages totaled 120, of which 35 are in the Bell and Fern small watersheds, and 85 are forest-wide. Fifteen of the gages are automatic instruments which record directly the amount and intensity of the rainfall. 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.