The usher : Comprising arithmetic in whole numbers; federal money; decimal and vulgar fractions; a description and use of Coggeshall's sliding rule; some uses of Gunter's scale; superficial and solid measuring; geometrical definitions and problems; surveying; the surveyor's pocket companion, or trigonometry made easy; a table of sines; a table of tangents; miscellany; tables of the weight and value of gold coins. : Calculated and designed for youth. /