Présentation de l'éditeur
The data and descriptive matter given herein, are largely based upon private notes and upon information and material scattered through text-books, technical bulletins, and in original papers in technical and scientific journals. Much of this data is either inaccessible or in such a form ias not to be readily applied or interpreted and hence is not likely to be utilized by those who have the most active interest in coal. In the preparation and arrangement of the material, three distinct classes of readers have been to a certain extent kept in mind: (1) The mechanical and power plant engineer; (2) The chemical engineer and chemist; (3) The non-technically trained business man and operator who has to do with the buying and selling of the coal. In including data which might be of interest and value to these different groups of readers a portion of the material is necessarily elementary for some and a portion is correspondingly technical for others. Good advice to each reader is to select that which may be of interest and use, and to pass over any discussion or data which may appear too elementary or too technical for his needs. To the technical man who is familiar with much of the data and many of the formulas given, it may appear that many of the simpler illustrations and details might perhaps just as well have been omitted. However, it is the writers experience that specific formulas and specific data are not, as a rule, likely to be given too much in detail to suit the occasional user, who may have neither the time nor the inclination to elaborate the formula or to check up the data. He wants each in a form easily understood and readily applicable to his needs.
(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.
Présentation de l'éditeur
This is a pre-1923 historical reproduction that was curated for quality. Quality assurance was conducted on each of these books in an attempt to remove books with imperfections introduced by the digitization process. Though we have made best efforts - the books may have occasional errors that do not impede the reading experience. We believe this work is culturally important and have elected to bring the book back into print as part of our continuing commitment to the preservation of printed works worldwide. This text refers to the Bibliobazaar edition.
Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.
