SECTION 53.-1. What is the Metric System? Ans. A system of weights and measures in which it takes 10 of a lower denomination to make 1 of the next higher.

2. Where is the Metric System used? Ans. In France, Belgium, and other countries of Europe. Its use is also authorized by law in the United States.

3. What is the unit of length? Ans. The Metre, from which the Metric System has its name.

4. How long is a Metre? Ans. About 393 inches. 5. How are lower denominations formed? Ans. From the metre other denominations, 6, 10, and 1000 as great, are formed with the prefixes deci (pronounced des'e), centi, and milli.

6. How are higher denominations formed? Ans. Denominations 10, 100, 1000, and ten thousand times as great as the metre, are formed with the prefixes deca, hecto, kilo, and myria.

The equivalents given in these Tables are not exact, but nearly so.

1 hec'tometre

1 kilometre

1 myr'iametre

=

6

7. How many centimetres in a metre? In half a metre? In 5 metres? In 17 metres ?. In a decimetre? 8. How many kilometres in 4000 metres ?

9. How many kilometres in 500 decametres? 10. What part of a decametre is a decimetre? A metre? 5 metres ? 8 metres?

11. What part of a metre is a decimetre? A centimetre? What part of a hectometre is a decametre?

12. How many metres in 15 decimetres? In of a decametre? In 250 centimetres? In of a hectometre? 13. Is a metre more or less than a yard? How many inches more?

14. About how many metres equal 1 rod?

15. What cost 4 metres of cloth, at $31 a metre ? 16. If a person sells 7 decimetres of velvet from a piece containing 3 metres, how much is what remains worth, at $10 a metre?

17. How many kilometres of fence will be required, to surround a square field 500 metres on each side?

18. At 75c. a metre, what will it cost to fence a square field, 30 metres on each side?

SECTION 54.-1. What is the unit of surface? Ans. The Are (pronounced air), a square whose side is 10 metres, and which equals 119 square yards.

MEASURES OF SURFACE.

The cen'tiare is 1 square metre, or 1550 square inches.

2. What is the unit of capacity? Ans. The Litre (pronounced le'tur), a cube equal to about of a quart of dry measure.

Ans.

3. How are other denominations formed? As before, by means of the prefixes deci, centi, and milli for lower denominations, and deca, hecto, and kilo for higher ones.

The kilolitre (1 cubic metre), when used in measuring wood, is called the STERE, and equals about of a cord.

10 steres make 1 dec'astere = about 23 cords.

4. How many ares in 550 centiares? In 5 hectares? 5. Are 2 hectares more or less than 5 acres, and how much?

6. What part of an are is 65 centiares?

7. What part of a litre is 5 centilitres? 7 decilitres? 2 millilitres ?

8. How many litres in 17 decalitres? In of a hectolitre? In 70 decilitres?

9. What is the cost of 12 hectolitres of molasses, at 12 cents a litre ?

10. How many litres of molasses, at 11 cents a litre, should be given in exchange for 3 decalitres and 3 litres of vinegar, at 8 cents a litre ?

11. If a person bought 2 hectolitres of molasses, and sold 10 decalitres, what was the rest worth, at 12 cents a litre ?

12. If one stere equals of a cord, how many steres make a cord?

MODEL. If 1 stere equals of a cord, it will take as many steres to make a whole cord, or 40, as 40 is contained times in 48; that is (rejecting the denominators), as 11 is contained times in 40, or 3. Ans. 37 steres.

13. If 1 litre equals of a quart, dry measure, how many litres make a quart?

14. Bought a decastere of wood, and sold 4 steres of it for $8; how much was that a stere? How much was what remained worth at the same rate?

15. At $1.75 a stere, what is the cost of 2 decasteres of wood?

16. A man bought 3 hectolitres of potatoes for $9. He sold them for 40 cents a decalitre. Did he gain or lose, and how much?

17. Reduce 1 litre 1 decilitre 1 centilitre to centilitres.

18. The kilolitre being a cubic metre, how long in inches is each side of the cube it represents?

19. If 1 decastere equals 23 cords, how many cords do 5 decasteres equal? 54 decasteres?

20. How many decasteres do 19 cords equal? 21. If a litre equals of a quart, dry measure, how many litres are there in 45 quarts?

22. What prefixes are used with the metre, &c., to form lower denominations? What prefixes are used, to form higher denominations?

SECTION 55.-1. What is the unit of weight? Ans. The Gram, which equals about 1543 grains.

100

=

21 lb. av.

1 myr'iagram =

22 lb. av.

10 kilograms,

10 quintals,

2. Which is greater, the common quintal or the quintal of the Metric System? How many pounds greater?

3. Which is greater, a ton or a tonneau ?

4. If a decagram equals of an ounce avoirdupois, how many decagrams will make an ounce?

5. How many kilograms in a quintal? In a tonneau? In 1 tonneau 9 quintals? In 4500 grams?

6. How many grams in 7 hectograms? In 900 centigrams? In 900 decagrams? In 900 decigrams? 7. If 1 kilogram equals 23 lb., when butter sells at $1.10 a kilogram, how many cents a pound is it?

8. What price per kilogram is equivalent to 40 cents a pound?

9. How many powders of one gram each can be put up from of a hectogram?

10. What part of a tonneau is a kilogram? 4 myriagrams?