## The slide rule and how to use it |

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answer approximately C I scale calculations ciphers are annexed ciphers directly following cube root decimal places decimal point distance divided dividend divisor example in Art factors figures preceding finding the number following the decimal given angle given in Art given number greater number hair-line crosses hand index hence left-hand A scale left-hand index main graduations method move the slide nificant figures number of ciphers number of decimal number of figures number of significant obtained opposite the index original number period contains position preceding the decimal product of 25.6 quotient reciprocal represent the mantissas result right-hand A scale right-hand index rule shown Rule.—If runner is set scale directly scale is set scale opposite scale read set the hair-line Set the index shown in Fig sine Slide moved slide projects slide rule square root tangent three figures three significant figures trigonometric functions turn the rule whole numbers