## Reciprocals of the integers from 1000 to 9999: arranged for use with mechanical calculating machines to facilitate the evaluation of quotients and compound fractions |

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4-figure number A C/S Adding and Listing adding machine automatically back transfer mechanism barrel-setting machine Clear the setting compound fractions continued quotient Control and Setting control register crank Q decimal fractions decimal point depressed depressed position digit counting entry evaluation of quotients extreme left-hand position extreme left-hand slot extreme right-hand position follows forward or reverse forward turn handle insert the decimal juxtaposition key F keyboard left-hand side levers listing machines Mechanical barrel-setting calculators Move the carriage number of digits number whose reciprocal opposite the arrow procedure product pxq product pxqxr proof and result proof register opposite proof register respectively quotients and compound readings and positions reciprocal tables register reading register showing required quotient result and setting result register reverse counting reverse turn right to left set for forward setting and proof setting register shown in schematic significant figures simple products table-entry transfer the reading unity