Church's Laboratory Guide; A Manual of Practical Chemistry for Colleges and Schools, Specially Arranged for Agricultural Students

(This historic book may have numerous typos and missing te...)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906. Excerpt: ... from each, these thoroughly mixed by turning over together, and divided as before. In cases where the sampling takes a long time and water is lost during the process--eg., shoddy, which requires to be cut up with scissors--the water must be determined in a large sample of the original material, and again in the smaller sample taken for analysis after division, and allowance made for any loss of water. § ii. Analysis of Manures. Before beginning the several operations and analysis which follow, the directions given should be carefully read over, in order that a clear idea of the whole plan to be pursued may be first obtained. Bone-dust, Bone-shavings, Boiled Bones, Etc. These, and all other forms of unburnt bones, consist of calcium phosphate, calcium carbonate, carbonaceous and nitrogenous matters commonly called organic matter, moisture, with sandy impurities and minute quantities of other substances. The analysis for commercial purposes may be conducted as follows. Too much care cannot be exercised in order to secure a fair average sample of the manure. Eight or ten portions from different bags are first taken: these are well mixed; and a part is then ___ reduced, by grinding, sifting, s f _„„ and regnnding, to a moder-jMpsspter- fggf Moisture.--A conveni Fio. 22. entquantity,say 2 or 3 grams, is weighed into a watch-glass, provided with a coverglass and clips (Fig. 22), and kept in the water-oven, at the temperature of i00 C, till it ceases to lose weight; the loss is moisture. 0rganic Matter.--Weigh about 1.5 gram into a platinum crucible, cover it loosely with the crucible-lid, and raise the temperature very gradually to low redness. When the mass appears white, and no black particles are exposed on gently stirring with a platinum wi...

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The chemistry of paints and painting;

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The laboratory guide; a manual of practical chemistry for colleges and schools, specially arranged for agricultural students

(This historic book may have numerous typos and missing te...)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1888 Excerpt: ...and bone-shavings; they are of no value as manure. They consist chiefly of cellulose, and may be detected by their microscopic structure or by the action of H2S04 of sp. gr. 1-53, which dissolves them without blackening, and forms a solution which, on warming, diluting with water, and addition of ammonia, gives no precipitate. Bone-black, Animal Charcoal, &c. Partially burnt bones are to be analysed in the same way as fresh bone. They often contain a mere trace only of nitrogen. If it be required to determine the carbon present, this may be done by digesting 3 grams of the substance with dilute hydrochloric acid and collecting the residual sand and carbon on a tared filter, and weighing it after drying at 100 C. The carbon and filter-paper may then be burnt away in a crucible. The loss will represent the carbon and filter. Bone-ash. The organic matter, being very small in amount, may be neglected, and the whole volatile matter estimated together by carefully heating to low redness some of the finely powdered sample; this should be done in a covered crucible, as decrepitation is apt to occur. The analysis is in other respects conducted as with bone-dust. Not more than 1 gram (or 16 grs.) should be taken for analysis. A nitrogen combustion is unnecessary. Apatite, and its numerous varieties, known as phosphorite, osteolite, staffellite, &c., contains a very large proportion of calcium phosphate associated with calcium chloride or fluoride, and minute quantities of moisture, oxide of iron and alumina, insoluble matter (which, in the case of some apatites, is partly a cerium phosphate called cryplolite), and occasionally calcium carbonate. Fluorine should be first tested for. Some of the powdered mineral is placed in a platinum vessel, moistened with oi...

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The Chemistry of Paints and Painting - Scholar's Choice Edition by Church, Arthur Herbert (2015) Paperback

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The Chemistry of Paints and Painting (Classic Reprint)

(Dr. Wilhelm Ostwald. I have incorporated with the present...)

Dr. Wilhelm Ostwald. I have incorporated with the present issue the substance of the paragraphs which he introduced into my original text; these are indicated by the sign 1. In preparing the following pages for the press, I have to acknowledge, as on previous occasions, the help of several friends and correspondents. A mongst these I specially name Mr. J. Scott Taylor, many of whose suggestions have been incorporated in the text, and also Dr. A. P. Laurie, my successor in the chair of Chemistry in the Royal Academy of A rts. Of recent years the literature dealing with the subjects to which the present handbook is devoted has greatly increased. Several of the volumes named in my Bibliographical Notes are of sterling merit and contain original material of no little importance. But I am bound to confess that I have met with several disappointments when searching for records of new facts in recent dictionary articles, reports of lectures, and treatises. On perusal a familiar note seemed sometimes to be struck; and I ultimately identified not a little of the material as my own. I will not dwell on this matter; it is indeed some consolation to feel that such transferences from my pages would not have taken place had not the paragraphs and tables and comments been deemed of some value. (Typographical errors above are due to OCR software and don't occur in the book.) About the Publisher Forgotten Books is a publisher of historical writings, such as: Philosophy, Classics, Science, Religion, History, Folklore and Mythology. Forgotten Books' Classic Reprint Series utilizes the latest technology to regenerate facsimiles of historically important writings. Careful attention has been made to accurately preserve the original format of each page whilst digitally enhancing the aged text. Read books online for free at www.forgottenbooks.org

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The Chemistry of Paints and Painting by Church, Arthur Herbert (2010) Paperback

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The Chemistry of Paints and Painting (Classic Reprint)

(This handbook first appeared in the spring of 1890; two y...)

This handbook first appeared in the spring of 1890; two years afterwards a second and revised edition was published. The work having now been long out of print and a considerable amount of fresh material having accumulatedi I felt that the time for a corrected issue had arrived. The plan of the book has not been altered, yet scarcely a page remains without change or addition. The bibliography has been augmented, while as to the body of the text, important corrections have been made or paragraphs introduced in the accounts given of paper, plaster, oil in paints, resins, solvents, classification of pigments, and triab of pigments. Several new pigments or new varieties of old pigments are mentioned and described; some old pictures and drawings not previously noticed in my chapter on this subject are critically examined for the first time. The last six pages Of the former editions of the present work were occupied with a digest of an important newspaper discussion on the effect of light upon water-colour drawings. (Typographical errors above are due to OCR software and don't occur in the book.) About the Publisher Forgotten Books is a publisher of historical writings, such as: Philosophy, Classics, Science, Religion, History, Folklore and Mythology. Forgotten Books' Classic Reprint Series utilizes the latest technology to regenerate facsimiles of historically important writings. Careful attention has been made to accurately preserve the original format of each page whilst digitally enhancing the aged text. Read books online for free at www.forgottenbooks.org

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Church's Laboratory Guide: A Manual Of Practical Chemistry For Colleges And Schools, Specially Arranged For Agricultural Students...

(This is a reproduction of a book published before 1923. T...)

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Church's Laboratory Guide: A Manual Of Practical Chemistry For Colleges And Schools, Specially Arranged For Agricultural Students 8 Arthur Herbert Church, Edward Kinch Gurney and Jackson, 1906 Chemistry

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The Chemistry of Paints and Painting

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The Chemistry of Paints and Painting - Scholar's Choice Edition

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The Chemistry of Paints and Painting - Primary Source Edition

(This is a reproduction of a book published before 1923. T...)

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

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Food-Grains of India (Classic Reprint) by A. H. Church (2015-09-27)

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The laboratory guide : a manual of practical chemistry for colleges and schools, specially arranged for agricultural students

(This book was originally published prior to 1923, and rep...)

This book was originally published prior to 1923, and represents a reproduction of an important historical work, maintaining the same format as the original work. While some publishers have opted to apply OCR (optical character recognition) technology to the process, we believe this leads to sub-optimal results (frequent typographical errors, strange characters and confusing formatting) and does not adequately preserve the historical character of the original artifact. We believe this work is culturally important in its original archival form. While we strive to adequately clean and digitally enhance the original work, there are occasionally instances where imperfections such as blurred or missing pages, poor pictures or errant marks may have been introduced due to either the quality of the original work or the scanning process itself. Despite these occasional imperfections, we have brought it back into print as part of our ongoing global book preservation commitment, providing customers with access to the best possible historical reprints. We appreciate your understanding of these occasional imperfections, and sincerely hope you enjoy seeing the book in a format as close as possible to that intended by the original publisher.

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