TABLE.

144 square inches (sq. in.) are 1 square foot, sq. ft. • 9square feet

“ 1 square yard, sq. yd. 304 square yards, or 2724 sq. ft. “ 1 square rod, sq. rd. 160 square rods

« 1 acre, A. 640 acres

“ 1 square mile, or section, sq. mi. An acre contains 43,560 square feet. A rood (R.) is 40 square rods.

CAPACITY MEASURES. 172. Liquid Measures are used in measuring liquids.

173. Dry Measures are used in measuring grain, roots, fruit, etc.

TABLES.

Liquid.

Dry. 4 gills (gi.) are 1 pint, pt. 2 pints (pt.) are 1 quart, qt. 2 pints « 1 quart, qt. 1 8 quarts " 1 peck, pk. 4 quarts “ 1 gallon, gal. I 4 pecks “ i bushel, bu.

The gallon contains 231 cubic inches ; 4 quarts dry measure, 2684 cubic inches ; and the bushel, 2150.42 cubic inches.

A hogshead as a measure is 63 gallons ; and a barrel, 31) gallons.

26. How many gallons in 41 qt.? In 53 qt.? In 60 pt. ? In 120 gi. ? In 89 qt. ?

27. How many pecks in 48 quarts ? How many bushels ?

28. Change to larger measures, 100 pt. of milk; 64 qt. of nuts; 84 gi. of oil.

29. What is a six-gallon can of milk worth at 5 cents a quart?

30. I take a pint of milk at night and a quart in the morning. What is my weekly milk-bill at 7 cents a quart?

31. What cost 62 bu. of potatoes at $1 a bushel ?

32. I burn a pint of kerosene every night. What will a 2 weeks' supply cost me at 20 cents a gallon ?

33. Bought nuts for $2 a bushel, and sold them for 10 cents a quart. How much did I gain on 5 bushels ?

WEIGHTS.

174. Troy Weights are used in weighing gold, silver, and jewels.

175. Avoirdupois Weights are used in weighing all common articles.

TABLES.
Troy.

Avoirdupois. 24 grains (gr.) are 1 pennyweight. / 16 ounces (oz.) are 1 pound, lb. 20 pwt. “ 1 ounce, oz. 100 pounds • 1 cental, ctl.. 12 ounces “ 1 pound, lb. 2000 pounds « 1 ton, T.

1. The long ton of 2240 avoirdupois pounds is used at customhouses, and in weighing coal at the mines.

2. A pound avoirdupois is equal to 7000 grains, so that 192 ounces avoirdupois are equal to 170 ounces troy, and 144 pounds avoirdupois are equal to 175 pounds troy. A hundred-weight (cwt.) is the same as the cental.

176. Time is a measured portion of duration.

TABLE.

60 seconds (sec.) are 1 minute, min.
60 minutes

« 1 hour, h.
24 hours

« 1 day, d. 365 days

• 1 common year, y. 366 days

6 i leap year, 1. y. Also, 7 days

are 1 week, wk. 12 calendar months (mo.) “ 1 year, y. 100 years

• 1 century. 1. The Civil Day begins and ends at 12 o'clock, midnight.

2. The Calendar Months, and the number of days in each, are, — 1. January, -31 days. 1 7. July, 31 days.. 2. February, 28 or 29"

8. August, 3. March,

9. September, 30 " 4. April,

10. October, 5. May,

11. November, 30 € 6. June,

12. December 31 3. The Solar Year is 365 d. 5 h. 48 min. 49.7 sec., or very nearly 3654 days. The fraction in 4 years amounts to nearly a day. Hence,

When the number of any year is divisible by 4 and not by 100, and when it is divisible by 400, the month of February has 29 days, and the year is called a leap year.

ORAL EXERCISES. 42. How many minutes in 2 h.? In 3} h. ? Inh. ? In 3 h. 20 min. ?

43. How many hours in 210 min.? In 3 d.? In wk. ? 44. How many days in 96 h.? In 60 h. ?

45. How many minutes from 10.25 A. M. to 11.45 A. M. ? From 11.50 A. M to 1.35 P. M. ?

46. What part of a minute is 42 sec. ? What part of an hour is 48 min. ?

47. How many days from Mar. 31 to May 31 ? From June 7 to July 15 ? From Oct. 19 to Nov. 12 ?

48. How old is a child on July 4, 1883, who was born May 31, 1880 ?

49. If a three weeks' vacation begins June 21, when does it end ? If it ends Oct. 9, when does it begin ?

50. What day was 25 days before Mar. 4, 1880 ? Sixty days after ?

51. How long from Thursday noon to 4.30 P. M. of Friday ?

52. How long is the night when the sun sets at 7.35 and rises at 4.30 ?

53. Name the next six leap years.

54. What century is this? In what century did 1620 come ?