Présentation de l'éditeur
The chapter onS team Turbines is new, and so is the greater part of the chapter on Gas andO il Engines. In dealing with the properties of steam a departure has been made from the earlier treatment, by accepting the characteristic equation of Callendar along with the steam tables derived from it by Mollier. The older data, based chiefly on experiments by Regnault, which were for a long time followed by engineers, involved serious inconsistencies and errors. Callendar smethod of treatment escapes inconsistencies, and gives figures which are in harmony with the most trustworthy and most recent results of experiment. The theoretical work of Callendar on this subject, notwithstanding its importance, is but little known to engineers. In Germany it has been applied by Mollier to the calculation of steam tables which, with his kind permission, are here reproduced with additions making them more suitable for use byE nglish engineers. Mollier has also enriched technical thermodynamics by the invention of novel graphic methods of representing the properties of steam and of solving steam-engine problems. He has allowed the author to reproduce his new steam charts, as well as the tables, and thereby to place in the hands of English students material of great interest and practical value. The Fahrenheit scale of temperature has been definitely abandoned: the Centigrade scale is used throughout. To adhere to Fahrenheit degrees and the quantities dependent on them is to maintain a wholly unnecessary and exceedingly inconvenient barrier not only between applied science and the science of the physical laboratory but also between the engineering of England and that of other countries.
(Typographical errors above are due to OCR software and don't occur in the book.)
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