Excerpt from The Red Spider on Hops in the Sacramento Valley of California Incubation - The incubation period varies according to temperature and general climatic conditions. In the experiments conducted at Berkeley, Cal., during February, 1912, the incubation period was found to be from 8 to 10 days. This period during May Was from 5 to 10 days, with an average of 7. 2 days, While In July, 1911, and during some very warm weather In 1 912 it was only 4a days. Tlie relatively higher temperatures of the summer are responsible for this shortening. 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.