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Slide Rule

Slide Rule

The slide rule was invented in 1620 AD by an English mathematician named William Oughtred. It was the first analogue device that worked on the simple principle of logarithm.Slide rule was used by engineers and professional mathematical workers of all generation until pocket calculator was invented. This tool contains two rulers and a cursor.The middle ruler can slide over the outer ruler, by sliding two scales side by side and by noting the number place of the cursor pointing to the value will be the correct answer. It was easy to find the product quotient and other functions simply viewing on the scales.








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