Walter A. Shewhart Quote
Both pure and applied science have gradually pushed further and further the requirements for accuracy and precision. However, applied science, particularly in the mass production of interchangeable parts, is even more exacting than pure science in certain matters of accuracy and precision.
Shewhart, Walter A.; Deming, William E. (1939). Statistical Method from the Viewpoint of Quality Control. The Graduate School, The Department of Agriculture. p. 120.