Business: HARMONIC COMPLEX

Crusty, cold-bath-and-calisthenics-loving James Oliver perfected the "Oliver Chilled Plow" in 1868. Although the first metal plow had been made in 1837, Oliver's chilled cast-iron model was such an improvement that he has been regarded ever since as the father of the modern plow. Last week Oliver Farm Equipment Co. of South Bend, Ind. proudly announced the "Raydex" base and point, "greatest advance in plow-making" since 1868—the first entirely machine-made plow base.

Base of the conventional plowshare is an harmonic complex of two curves blending into one another. Because no machine could fit the contour exactly, these bases always had to be hand-polished....

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