A complete system of mental arithmetic

100 articles 1½ per cent 9 months ALLISON'S amount by double articles at 10d articles at 8d Brunck's day amount days at 1d ditto Miss Double the given double the rate dozen articles Drachm EDWARDS ETON EXAMPLE feet find interest find the interest find the value Firkin fractions FRENCH gallon give the answer given number given price given rate gross of articles halfpenny Halsted halves per cent hundred weight inches wide interest of 60 Maneh MEDEA MENTAL ARITHMETIC Multiply the amount multiply the whole Note to Rule number of dozens number of halves number of months number of pence number of shillings ounce penny pound PROPOSITION XXVI PROPOSITION XXVII rate per cent remainder Shekel shillings and pence SIMPKIN SOPHOCLES Spurge Square of 63 sum of money taken as farthings taken as pence three farthings tiply unit figure XXIII yard دو