Development
CAW could not have been created if not for the discovery of the electric arc by Sir Humphry Davy in 1800, later repeated independently by a Russian physicist Vasily Vladimirovich Petrov in 1802. Petrov studied electric arc and proposed its possible ways of usage, including for welding.
The inventor of carbon-arc welding was another Russian, Nikolay Benardos, who developed this method in 1881 and patented it later under the name Elektrogefest ("Electric Hephaestus").
Read more about this topic: Carbon Arc Welding
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“I hope I may claim in the present work to have made it probable that the laws of arithmetic are analytic judgments and consequently a priori. Arithmetic thus becomes simply a development of logic, and every proposition of arithmetic a law of logic, albeit a derivative one. To apply arithmetic in the physical sciences is to bring logic to bear on observed facts; calculation becomes deduction.”
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