ORAL EXERCISES ON SQUARE MEASURE. How many 1. Square inches in 4 sq. ft.? In 5 sq. ft.? In 720 sq. in.? 2. Acres in 20 sq. ch.? In 100 sq. ch.? In 2 sq. mi.? 5. Roods in 200 sq. yd.? In 144 sq. ft.? In 20 acres? In 20 sq. ch.? 6. Acres in 24 R.? In 2 sq. mi.? In 640 sq. rd.? 7. Square chains in 48 acres? 8. Square miles in 1920 A.? 9. Townships in 108 sq. mi.? In 120 acres? In 360 sq. mi.? 10. What is the difference between 5 square feet and 5 feet square? 117. Measures of Volume. A Volume is that which has length, breadth, and thickness. A Cube is a volume bounded by six equal squares. Cubic Measure is used for measuring solids. A cord of wood is a pile 8 ft. long, 4 ft. wide, and 4 ft. high, and contains 128 cu. ft. A perch of stone or of masonry is 16 ft. long, 14 ft. wide, and 1 ft. high, and contains 243 cu. ft. A cubic yard of earth is called a load. 118. Measures of Capacity. I. Liquid Measure is used for measuring liquids. In determining the capacity of reservoirs, cisterns, etc., the A liquid gallon contains 231 cu. in. NOTE. The imperial gallon of Great Britain contains 277.274 cu. in. Ale, beer, etc. were formerly sold by a gallon of 282 cu. in. II. Dry Measure is used for measuring grain, fruit, vege.tables, etc. TABLE. A bushel contains 2150.42 cu. in. NOTE 1.-The imperial bushel of Great Britain contains 2218.192 cu. in. NOTE 2.-The gallon, quart, and pint, dry measure, are greater than the corresponding quantities in liquid measure. For example, a quart, dry measure, of a bushel (2150.42 cu. in.), or 67.2 cu. in.; while a quart, liquid measure, = = of a gallon (231 cu. in.), or 57.75 cu. in. III. Apothecaries' Fluid Measure is used for mixing 9. When apples are selling at 10 cents a half-peck, at what The year is divided into 12 Calendar Months, as follows: The time required for the earth to revolve around the sun is 365 da. 5 hr. 48 min. 49.7 sec., or nearly 365 days. This fractional part of a day is omitted each year until the fourth year, when the time lost amounts to almost a day. This is corrected by adding a day to the month of February. Since the time lost each year is a little less than of a day, by 400 years. adding a day every fourth year we gain nearly a day every To offset this gain every fourth centennial year is made a common year instead of a leap year. Hence Every year divisible by 4, except the centennial years, and every centennial year divisible by 400, is a leap year; all the others are common years. 4. Days in 5 wk.? In 144 hr.? In 240 hr.? 5. Days in 2 common years? In 2 leap years? 6. What months have 30 days each? 31 days each? 7. What part of an hour is 30 min.? 15 min.? 10 min.? 8. Which of the following years are leap years: 1600? 1894? 1800? 1880? 1896? 1900? 2000? 9. When does this century end? 10. How many leap years in a century? 120. Angular Measure. Angular Measure is used in measuring angles and arcs. A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within, called the centre. The Circumference of a circle is the bounding line. One-fourth of the circumference is a quadrant. An Arc is any part of a circumference. B 180 D E 90 For convenience of measuring the circumference is divided into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; each minute into 60 equal parts, called seconds. The length of a degree of longitude at the earth's equator is A barrel of flour weighs 196 pounds. A firkin of butter weighs 56 pounds. NOTE.-Some of these weights differ slightly in different States. |