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Page 315 - Telegraphy has received many no less startling additions since then. The official name now given to this branch of electrical practice is Radio-Telegraphy. The subject has now reached a thoroughly practicable stage, and this book presents it in clear, concise form. The various services for which Radio-Telegraphy is or may be used are indicated by the author. Every stage of the subject is illustrated by diagrams or photographs of apparatus, so that, while an elementary knowledge of electricity is...
Page 316 - In describing each process the object in view has been to give an insight into the rationale of each step, so far as it is known or understood, from the point of view of principles and methods rather than as mere rule of thumb description of manufacturing manipulations. The processes described are, with the exception of those described as obsolete, to the author's definite knowledge, in commercial use at the present time. Precious Stones. By W. GOODCHILD, MB, B.Ch. With 42 Illustrations. With a Chapter...
Page 317 - It will be of value to those engaged in trades and industries where a knowledge of the patenting of inventions and the registration of trade marks is important. Full information is given regarding patents in foreign countries. The Book; Its History and Development. By CYRIL DAVENPORT, VD, FSA With 7 Plates and 126 Figures in the text. LIST OF CONTENTS : Early Records. Rolls, Books and Book bindings. Paper. Printing. Illustrations. Miscellanea. Leathers. The Ornamentation of Leather Bookbindings without...
Page 315 - No subject is fraught with so many possibilities of development for the future relationships of the peoples of the world. India-Rubber and its Manufacture, with Chapters on Gutta-Percha and Balata. By HL TERRY, FIC, Assoc.Inst.MM With Illustrations. LIST OF CONTENTS : Preface. Introduction : Historical and General. Raw Rubber. Botanical Origin. Tapping the Trees. Coagulation. Principal Raw Rubbers of Commerce. PseudoRubbers. Congo Rubber. General Considerations. Chemical and Physical Properties....
Page 316 - Transparency and Colour. Raw materials of manufacture. Crucibles and. Furnaces for Fusion. Process of Fusion. Processes used in Working of Glass, Bottle. Blown and. Pressed. Rolled or Plate. Sheet and Crown. Coloured. Optical Glass : Nature and Properties, Manufacture. Miscellaneous Products. Appendix. Bibliography of Glass Manufacture. Index, This volume...
Page iv - Gold and Precious Metals. By THOMAS K. ROSE, D.Sc., of the Royal Mint. Photography. By ALFRED WATKINS, Past President of the Photographic Convention.
Page 314 - Illustrations. CONTENTS : Introduction and Historical Survey. Aluminium. Production. Details of Processes and Works. Costs. Utilization. Future of the Metal. Bullion and Gold. Silver Refining Process. Gold Refining Processes. Gold Extraction Processes. Calcium Carbide and Acetylene Gas. The Carbide Furnace and Process. Production. Utilization. Carborundum. Details of Manufacture. Properties and Uses. Copper. Copper Refining. Descriptions of Refineries. Costs. Properties and Utilization. The Elmore...
Page 312 - Liquid and Gaseous Fuels, and the Part they play in Modern Power Production. By Professor VIVIAN B. LEWES, FIC, FCS , Prof, of Chemistry, Royal Naval College, Greenwich.
Page 315 - MONCKTON, MIEE With 173 Diagrams and Illustrations. CONTENTS : Preface. Electric Phenomena. Electric Vibrations. Electro-Magnetic Waves. Modified Hertz Waves used in RadioTelegraphy. Apparatus used for Charging the Oscillator. The Electric Oscillator : Methods of Arrangement, Practical Details. The Receiver : Methods of Arrangement, The Detecting Apparatus, and other details. Measurements in Radio-Telegraphy. The Experimental Station at Elmers End : Lodge-Muirhead System.