Henry Babbage's Analytical Engine Mill, 1910.
Henry Babbage's analytical engine (incomplete), with various spare parts and patterns for casting. Henry Prevost Babbage (1824-1918), the youngest son of Charles Babbage (1791-1871), the English computer pioneer, built a hand-operated printing calculator, based on the plans for the mill of his father's Analytical Engine. It was a four-function calulator designed for addition, subtraction, multiplication and division.
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