Of all the inventions of the nineteenth century, the scientist is one of the most striking. In revolutionary France the science student, taught by men active in research, was born; and a generation later, the graduate student doing a PhD emerged in Germany. In 1833 the word ?scientist? was coined; forty years later science (increasingly specialised) was a becoming a profession. Men of science rivalled clerics and critics as sages; they were honoured as national treasures, and buried in state funerals. Their new ideas invigorated the life of the mind. Peripatetic congresses, great exhibitions, museums, technical colleges and laboratories blossomed; and new industries based on chemistry and electricity brought prosperity and power, economic and military. Eighteenth–century steam engines preceded understanding of the physics underlying them; but electric telegraphs and motors were applied science, based upon painstaking interpretation of nature. The ideas, discoveries and inventions of...

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