This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

John Hopkinson (1849-98) was a British electrical engineer who invented the three-wire system for the distribution of electricity. Originally published in 1901, this book forms the first in two volumes of Hopkinson's papers, focusing mainly on technical subjects. The text also incorporates editorial notes, numerous illustrative figures and a memoir of Hopkinson's life. Material of a more purely scientific character can be found in the second volume. This book will be of value to anyone with an interest in Hopkinson, engineering and the history of science.

John Hopkinson (1849-98) was a British electrical engineer who invented the three-wire system for the distribution of electricity. Originally published in 1901, this book forms the second of two volumes of Hopkinson's papers, focusing mainly on scientific areas. The text also incorporates editorial notes and numerous illustrative figures. Material of a more technical nature can be found in the first volume. This book will be of value to anyone with an interest in Hopkinson, engineering and the history of science.