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TWENTIETH CENTURY INVENTIONS

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GEORGE SUTHERLAND, M.A.

LONGMANS, GREEN, AND CO.

39 PATERNOSTER ROW, LONDON

NEW YORK AND BOMBAY

1901

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PREFACE.

TWENTY years ago the author started a career

a in technological journalism by writing descriptions of what he regarded as the most promising inventions which had been displayed in international exhibitions then recently held From that time until the present it has been his constant duty and practice to take note of the advance of inventive science as applied to industrial improvement—to watch it as an organic growth, not only from a philosophical, but also from a practical, point of view. The advance towards the actual adoption of any great industrial invention is generally a more or less collective movement; and, in the course of a practice such as that referred to, the habit of watching the signs of progress has been naturally acquired.

Moreover, it has always been necessary to take a comprehensive, rather than a minute

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