Excerpt from Modern Refrigerating Machinery: Its Construction, Methods of Working and Industrial Applications, a Guide for Engineers and Owners of Refrigerating Plants

The preparation of this work, which is intended especially to meet practical requirements and which appeared first at the end of 1896, and as a second edition in the beginning of 1899, has been urged upon me by several colleagues. I have attempted to treat of the province of the artificial production of cold and of its applications as they exist at the present time, but I have limited myself to European conditions which have come within my own experience.

The aim of the book forbids a mathematical treatment of the subject, those numbers arrived at theoretically and necessary to the understanding of the processes described, together with numerous physical data, hence only find a place in Tables. I have sought to explain the application of these results to the elementary, approximate solution of the most important practical problems by the insertion of numerical examples.

For a detailed and more especially theoretical treatment, with which the designer cannot dispense, I must refer the reader to text-books on Thermodynamics and to my papers: "Beitrage zur Beurleilung von Kühlmaschinen, " Zeitschrift des Vereins Deutscher Ingenieure, 1894, "Vergleichende Theorie und Berech-nung der Kompressions-Kühlmaschinen, " Zeitschrift für die gesamte Kälteindustric, 1897, and "Die Wirkungsweise und Berechnung der Ammoniak-Absorptionsmaschinen, " ibid., 1899.

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