D

A

COLLECTION

OF

MATHEMATICAL RULES AND TABLES:

INCLUDING

INTEREST, EQUATION OF PAYMENT, MENSURATION,
GEOMETRY AND TRIGONOMETRY,

RULES FOR CALCULATING DIAMETER, CIRCUMFERENCE,
AREA AND SQUARING THE CIRCLE.

TOGETHER WITH

THE METRIC SYSTEM

OF-

WEIGHTS AND MEASURES FOR PURVEYING MEDICINES AND OTHER
OFFICIAL PURPOSES.

RULES FOR CONVERTING TERMS OF U. S. APOTHECARIES' WEIGHTS
AND MEASURES INTO THEIR RESPECTIVE EQUIVALENTS
OF THE METRIC SYSTEM.

BY

JAMES MORTON.

THIRD EDITION, ENLARGED.

PHILADELPHIA:

DAVID MCKAY, 23 S. NINTH STREET.

1887.

7-4372

Math 313.81

,༦༩,༤།

Entered, according to Act of Congress, in the year 1878, by
JAMES MORTON,

in the Office of the Librarian of Congress, at Washington.

PREFACE.

It is not the purpose of the writer to introduce to the public any new principle, but the result of laborious calculations culminating in the final elucidation of facts.

The Interest Table is calculated on the usual custom adopted by bankers-of 30 days to the month.

The other tables are collated from the best authorities.