year, 684 dollars the second, and as much the third as he gained during the first and second; how much was his whole gain? Ans. 2268 dollars. 45. I bought three village lots for 12570 dollars, and sold them so as to gain 745 dollars on each lot; for how much did I sell them? Ans. 14805 dollars.

46. A has 3240 dollars, B has 5672 dollars, and C has 1000 more than A and B together; how many dollars have all? Ans. 18824 dollars. 47. A man was 32 years old when his son was born; how old will he be when his son is 36 years old? Ans. 68 years.

48. The Old Testament contains 39 books, 929 chapters, 23214 verses, 592439 words, and 2728100 letters; the New Testament contains 37 books, 269 chapters, 7959 verses, 181153 words, and 838380 letters; what is the total number of each in the Bible?

Ans. 76 books, 1198 chapters, 31173 verses, 773592 words, and 3566480 letters.

49. The number of immigrants landed in New York in 1858 was 78589, in 1859, 79322, and in 1860, 103621;. what was the total number landed in the three years?

Ans. 261532.

50. In 1860, the population of New York was 814277, of Philadelphia 568034, of Boston 177902, of New Orleans 170766, of St. Louis 162179, of Chicago 109429, and or Cincinnati 160000; what was the total population of these cities? Ans. 2162587

51. In the year 1856, the United States exported molasses to the value of 154630 dollars; in 1857, 108003 dollars; in 1858, 115893 dollars; what was the value of the molasses exported in those three years? Ans. 378526 dollars.

52. During the same years, respectively, the United States

exported tobacco to the value of 1829207 dollars, 1458553 dollars, and 2410224 dollars; what was the total value of the tobacco exported in those years? Ans. 5697984 dollars.

53. How many miles from the southern extremity of Lake Michigan to the Gulf of St. Lawrence, passing through Lake Michigan, 330 miles; Lake Huron, 260 miles; River St. Clair, 24 miles; Lake St. Clair, 20 miles; Detroit River, 23 miles; Lake Erie, 260 miles; Niagara River, 34 miles; Lake Ontario, 180 miles; and the River St. Lawrence, 750 miles? Ans. 1881 miles.

54. At the commencement of the year 1858 there were in operation in the New England States, 3751 miles of railroad; in New York, 2590 miles; in Pennsylvania, 2546; in Ohio, 2946; in Virginia, 1233; in Illinois, 2678; and in Georgia, 1233; what was the aggregate number of miles in operation in all these States? Ans. 16977.

55. The number of pieces of silver coin made at the United States Mint at Philadelphia in the year 1858, were as follows: 4628000 half dollars, 10600000 quarter dollars, 690000 dimes, 4000000 half dimes, and 1266000 threecent pieces; what was the total number of pieces coined ? Ans. 21184000.

SUBTRACTION.

42. Subtraction is the process of determining the difference, between two numbers of the same unit value. 43. The Difference or Remainder is the result obtained.

22 from

1 from 3 leaves
1 from 4 leaves 3 2 from
1 from 5 leaves 4 2 from
1 from 6 leaves 5 2 from
1 from 7 leaves 6 2 from
1 from 8 leaves 7/2 from 9 leaves
1 from 9 leaves 8 2 from 10 leaves
1 from 10 leaves 9 2 from 11 leaves
1 from 11 leaves 10 2 from 12 leaves 10 3 from 13 leaves 10

4 leaves

2 3 from

5 leaves

2

5 leaves

3 3 from

6 leaves

3

6 leaves

43 from

7 leaves

4

5 from 6 leaves 16 from 7 leaves 17 from 8 leaves

5 from 15 leaves 10 6 from 16 leaves 10 7 from 17 leaves 10

111 from 12 leaves
211 from 13 leaves
3 11 from 14 leaves

8 from 18 leaves 10

9 from 10 leaves 1 10 from 11 leaves 112 from 13 leaves 1 9 from 11 leaves 2 10 from 12 leaves 2 12 from 14 leaves 2 9 from 12 leaves 3 10 from 13 leaves 3 12 from 15 leaves 3 9 from 13 leaves 4 10 from 14 leaves 4 11 from 15 leaves 4 12 from 16 leaves 4 9 from 14 leaves 5 10 from 15 leaves 5 11 from 16 leaves 5 12 from 17 leaves 5 9 from 15 leaves 6 10 from 16 leaves 6 11 from 17 leaves 6 12 from 18 leaves 6 9 from 16 leaves 7 10 from 17 leaves 7 11 from 18 leaves 712 from 19 leaves 7 9 from 17 leaves 8 10 from 18 leaves 811 from 19 leaves 8 12 from 20 leaves 8 9 from 18 leaves 9 10 from 19 leaves 911 from 20 leaves 9 12 from 21 leaves 9 9 from 19 leaves 10 10 from 20 leaves 10 11 from 21 leaves 10 12 from 22 leaves 10

MENTAL EXERCISES.

1. A grocer having 20 boxes of lemons, sold 12 boxes; how many boxes had he left? =

ANALYSIS. He had left the difference between 20 boxes and « 12 boxes, which is 8 boxes. Therefore, he had 8 boxes left.

2. If a man earn 12 dollars a week, and spend 7 for provisions, how many dollars has he left?

3. If I borrow 15 dollars, and pay 9 dollars, how many dollars remain unpaid?

4. John had 11 marbles, and lost 5 of them; how many had he left?

5. From a cistern containing 22 barrels of water, 9 barrels leaked out; how many barrels remained?

6. In a school are 24 boys and 12 girls; how many more boys than girls?

7. From a piece of cloth containing 17 yards, 8 yards were cut; how many yards remained?

8. Orin paid 15 dollars for a coat, and 9 dollars for a pair of pantaloons; how much more did he pay for the coat than for the pantaloons?."

9. Cora is 23 years old, and her brother is 10 years younger; how old is her brother?

10. A jeweler bought a watch for 11 dollars, and sold it for 18 dollars; how much did he gain?

11. A boy gave 21 cents for some pictures, which were worth no more than 17 cents; how much more than their value did he give for them?

12. A grocer bought a barrel of sugar for 16 dollars, but it not proving as good as he expected, he sold it for 11 dollars; how much did he lose on it?