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Thumbnail for Electrical horology: a practical manual on the application of the principles and practice of electricity to horological instruments and machines for the measurement and transmission of time with an account of the earliest electrically-driven clock mechanism

Electrical horology: a practical manual on the application of the principles and practice of electricity to horological instruments and machines for the measurement and transmission of time with an account of the earliest electrically-driven clock mechanism

Langman, H. R.1946
Books, Manuscripts
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