### What people are saying -Write a review

We haven't found any reviews in the usual places.

### Contents

 SUM AND DIFFERENCE OF ANGLES 181 PLACES ON THE EARTH 189 STANDARD TIME 197

### Popular passages

Page 84 - Measures of Surface. The unit upon which surface measure is based is the square yard, which is a square each of whose sides equals 1 yard. TABLE OF COMMON SURFACE MEASURE 144 square inches (sq. in.) — 1 square foot (sq. ft.) 9 square feet — 1 square yard (sq. yd.) 30J square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) TABLE OF
Page 84 - 30J square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) TABLE OF SURVEYORS' SURFACE MEASURE 625 square links (sq. li.) = 1 square rod (sq. rd.) 16 square rods — 1 square chain (sq. ch.) 10 square chains - 1 acre (A.) 640 acres (a section) =- 1 square mile (sq. mi.) 36 square miles = 1 township (Tp.)
Page 212 - Write the pairs of factors of 36 thus: 1 and 36; 2 and 18; 3 and 12; 4 and 9; 6 and 6. Proceed similarly with the rest. The square root of a number is one of the two equal factors of
Page 239 - the United States: RULE.—Find the amount of the principal to the time when the payment or the sum of the payments equals or exceeds the interest due; subtract from this amount the payment or the sum of the payments. Treat the remainder as a new principal and proceed as before. ILLUSTRATIVE
Page 85 - Measures of Volume. TABLE OF CUBIC MEASURE 1728 cubic inches (cu. in.) — 1 cubic foot (cu, ft.) 27 cubic feet — 1 cubic yard (cu. yd.) TABLE OF EQUIVALENTS
Page 32 - 1. 3. The average hourly temperatures from 6 AM to 6 PM, December 26 to January 2, were: 6 AM 7 AM 8 AM 9 AM 10 AM 11 AM 21.5� 22.1� 22.2� 22.2� 22.5� 23.2� 12 M. 1 PM 2 PM 3 PM 4 PM
Page 217 - 30. A straight line drawn from the vertex of an isosceles triangle to the middle of the base is perpendicular to the base. Find the area of a regular pentagon whose sides are 24", if the radius of the circle drawn around the
Page 84 - MEASURE 625 square links (sq. li.) = 1 square rod (sq. rd.) 16 square rods — 1 square chain (sq. ch.) 10 square chains - 1 acre (A.) 640 acres (a section) =- 1 square mile (sq. mi.) 36 square miles = 1 township (Tp.)
Page 32 - 12 M. 1 PM 2 PM 3 PM 4 PM 5 PM 6 PM 23.9� 24� 24.5� 25.2� 25� 24.7� 24.3� Plot these readings on squared paper, or by measurement, as
Page 76 - 6. It is proved in Geometry that the ratio of the circumference of any circle to its diameter is about 3y, or more accurately 3.1416. If then, the diameter of a circle is known, how may the circumference be found without measurement?