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Excerpt from Foreign Agriculture, Vol. 17: June, 1953 Silk worms spend days spinning their cocoons on trays like the one at the back. Completed cocoons are shown in the foreground. Reeling raw silk thread in a. Thai village home. Cocoons are immersed in warm water until they are soft and'the thread can be reeled off in a single piece. 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.