The Hop and Its Constituents

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Excerpt from The Hop and Its Constituents: A Monograph on the Hop Plant Nearly a century has elapsed since the constituents of the hop cone first attracted of Chemists, and the fact that we are only now beginning to understand the principal chemical characters of some of those constituents and the roles they play in the brewing process, is in itself the strongest evidence of the magnitude of the difficulties which have been encountered. Seeing that the constituents in question (resins, bitter principles, essential oil, tannin, &c., )are among the most complicated substances with which the Chemist has to deal, it is not surprising that the older investigators were, as a rule, very wide of the mark, and that many of the earlier statements were hopelessly incorrect. During the past decade a number of Chemists have devoted attention to the investigation of the more important hop constituents, with the result that a great deal of definite information has been gained and many of the old errors cleared away. Nor has the knowledge thus acquired been merely of scientific interest, for it has thrown much light on the part played by the hop in the manufacture of our national beverage, and has already found industrial application to the great advantage both of the hop-growing and of the brewing industries. That there is much that is still doubtful and obscure is unfortunately true, but the rapid progress which has been made during recent years justifies the hope that before very long the existing gaps in our knowledge will be filled. 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.