Basic Slags And Rock Phosphates

Author : George Scott Robertson
Publisher : Forgotten Books
ISBN 13 : 9780265246597
Total Pages : 140 pages
Book Rating : 4.2/5 (465 download)

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Download or read book Basic Slags and Rock Phosphates (Classic Reprint) written by George Scott Robertson and published by Forgotten Books. This book was released on 2017-12-03 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Basic Slags and Rock Phosphates The utilisation of basic slag in agriculture is an excellent example of the help that modern science affords to the working farmer. A waste product of steel-making, resulting from a modification by Thomas and Gilchrist in 1878 of the Bessemer process, it was at first considered worthless and thrown on the refuse heap. The late Prof. John Wrightson made field experiments in 1884 and 1885 at Ferryhill and at Downton, and showed that the material had noticeable fer tilising value: this discovery was confirmed and developed by the systematic pot experiments of Paul Wagner at Darmstadt, which began in 1885 and continued for several years afterwards. Extensive field tests were made during the 'nineties by Sir (then Professor) J. J. Dobbie and Prof. D. A. Gilchrist at Bangor, and by Prof. W. Somerville and later on by Sir T. H. Middleton at Cockle Park, with the result that a considerable body of information was accumulated as to the effectiveness of basic slag under the various conditions obtaining in practice. This has already been summarised by Prof. Somerville in the Journal of the Board of Agriculture for 1911, 1918, etc. Some ten years ago, however, it became evident that the basic open hearth process would be a serious competitor with the Bessemer process, and chemical examination showed that the slag, though correctly described as 'basic slag, ' was altogether different from the material with which the agriculturist had become familiar. The upheaval caused by war and post-war conditions gave an enormous impetus to the Open hearth process, and it is now extending to so many works that before long the older process will probably cease to be Operated. This result is of course distinctly awkward for the agriculturist who sees a valuable fertiliser disappearing, and being replaced by one which is more costly and at first sight seems to be nothing like as good. 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.