When the proposed arc is greater than the semi.circumference of the circle, it is better first to compute the length of the arc which ... There arc several other rules, but involving complex and tedious calculations, from which closer approximations may be had if desired. ... Divide 6 times the height of the arc by the difference between 5 times the diameter and 3 times this height. ... The circumference, as has already been explained, is supposed to be equal to the perimeter of an inscribed oranbsp;...

Title | : | Loftus's inland revenue officer's manual |

Author | : | William Harris Johnston |

Publisher | : | - 1865 |

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