WATSON'S

TUTOR'S ASSISTANT;

OR, COMPLETE

SCHOOL ARITHMETIC:

ON A PLAN PECULIARLY CALCULATED TO

FACILITATE THE IMPROVEMENT OF THE PUPIL, AND REDUCE THE
LABOUR OF THE TEACHER;

TO WHICH IS ADDED, AN IMPROVED RULE FOR THE
EXTRACTION OF THE CUBE ROOT,

BY WHICH THE OPERATION IS PERFORMED

As easily, accurately, and expeditiously, as that of the Square Root;

TOGETHER WITH THE

USE OF THE CARPENTER'S SLIDING RULE;

AND A FULL AND FACILE

INTRODUCTION TO PRACTICAL MENSURATION;

ALSO,

AN APPENDIX,

Exhibiting various methods of 'Ready Reckoning,' chiefly intended as
EXERCISES IN MENTAL CALCULATION.

BY W. WATSON,

AUTHOR OF AN EASY AND COMPREHENSIVE INTRODUCTION TO ALGEBRA.'

FOURTH EDITION, MUCH IMPROVED.

LONDON:

SIMPKIN, MARSHALL, AND COMPANY;
W. B. JOHNSON, BEVERLEY; MOZLEY & SON, DERBY;

AND MAY BE HAD OF ALL BOOKSELLERS.

(Price only 2s, strongly bound in Sheep, or 2s. 6d. in Roan.)