ELECTRICAL ENGINEERING. Profusely SECOND EDITION, Revised. In Large 8vo. Handsome Cloth. CENTRAL ELECTRICAL STATIONS: Their Design, Organisation, and Management. BY CHAS. H. WORDINGHAM, A.K.C., M.INST.C.E., M. INST. MECH.E., Late Memb. of Council Inst. E. E., and Electrical Engineer to the City of Manchester; Electrical Engineer-in-Chief to the Admiralty. ABRIDGED CONTENTS. Introductory.-Central Station Work as a Profession.-As an Investment.-The Establishment of a Central Station-Systems of Supply.-Site.-Architecture.-Plant.-Boilers Systems of Draught and Waste Heat Economy.-Coal Handling, Weighing, and Storing. The Transmission of Steam. - Generators. - Condensing Appliances. - Switching Gear, Instruments, and Connections.-Distributing Mains.-Insulation, Resistance, and Cost.Distributing Networks. Service Mains and Feeders. -Testing Mains. Meters and Appliances.-Standardising and Testing Laboratory.-Secondary Batteries.-Street Lighting. Cost.-General Organisation. 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SIXTEENTH EDITION, Thoroughly Revised and Enlarged. OF ELECTRICAL RULES & TABLES FOR THE USE OF ELECTRICIANS AND ENGINEERS. BY JOHN MUNRO, C.E., & PROF. JAMIESON, M. INST. C. E., F.R.S. E. With Numerous Diagrams. Pocket Size. Leather, 8s. 6d. GENERAL CONTENTS. Units of Measurement. - Measures. - Testing. - Conductors. - Dielectrics. - Submarine Cables.-Telegraphy.-Electro-Chemistry.-Electro-Metallurgy.-Batteries.-Dynamos and Motors.-Transformers.-Electric Lighting.-Miscellaneous.-Logarithms.-Appendices. "WONDERFULLY PERFECT. Worthy of the highest commendation we can give it."-Electrician. "The STERLING VALUE of Messrs. MUNRO and JAMIESON'S POCKET-Book "Electrical Review. LONDON: CHARLES GRIFFIN & CO., LIMITED, EXETER STREET, STRAND By PROFESSORS J. H. POYNTING & J. J. THOMSON. In Five Volumes. Large 8vo. Sold Separately. A TEXT-BOOK OF PHYSICS. CONTENTS. 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CONTENTS.-The Nature of Sound and its chief Characteristics.-The Velocity of Sound in Air and other Media.-Reflection and Refraction of Sound.-Frequency and Pitch of Notes.-Resonance and Forced Oscillations.-Analysis of Vibrations.-The Transverse Vibrations of Stretched Strings or Wires.-Pipes and other Air Cavities.-Rods.-Plates. -Membranes.-Vibrations maintained by Heat.-Sensitive Flames and Jets.-Musical Sand.-The Superposition of Waves.- INDEX. "The work may be recommended to anyone desirous of possessing an EASY, UP-TO-DATE STANDARD TREATISE on Acoustics."-Literature. Very clearly written. 66 The names of the authors are a guarantee of the SCIENTIFIC ACCURACY and UP-TO-DATE CHARACTER of the work."- Educational Times. VOLUME III. At Press. Fully Illustrated. CONTENTS.-Temperature. 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"The work of a thoroughly practical chemist."-British Medical Journal. 66 Compiled with great care, and will supply a want."-Journal of Education ELEMENTARY METALLURGY: Including the Author's Practical Laboratory Course. With many Illustrations. [See p. 66 General Catalogue. THIRD EDITION, Revised. Crown 8vo. Cloth, 68. "Just the kind of work for students commencing the study of metallurgy."— Practical Engineer. LONDON: CHARLES GRIFFIN & CO., LIMITED, EXETER STREET, STRAND. Demy 8vo, Handsome cloth, 188. Physical Geology and Palæontology, ON THE BASIS OF PHILLIPS. BY HARRY GOVIER SEELEY, F. R. S., PROFESSOR OF GEOGRAPHY IN KING'S COLLEGE, LONDON. Witb Frontispiece in Cbromo-Litbography, and Illustrations. "It is impossible to praise too highly the research which PROFESSOR SEELEY'S 'PHYSICAL GEOLOGY' evidences. IT IS FAR MORE THAN A TEXT-BOOK-it is a DIRECTORY to the Student in prosecuting his researches."-Presidential Address to the Geological Society, 1885, by Rev. 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