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Numbers denoting weight are written in the same manner as numbers denoting length. (See Art. 545.)

EXAMPLES.

1. Express the following numbers as grams and add them: 8.5 dekagrams, 1000 centigrams, 225 decigrams. Ans. 117.58. 2. Express the following numbers as kilograms and add them: 7.2 hectograms, 8294 grams, 4 quintals. Ans. 409.014kg.

3. How many papers, each containing a kilogram, may be filled from 32 myriagrams of coffee? Ans. 640 papers.

4. Bought 1 tonneau of coal for $12; what is the cost of 1 kilogram of coal at the same rate? Ans. 12 mills.

5. What weight of mercury will a vessel contain whose capacity is 10 cubic centimeters, mercury being 13.5 times as heavy as water. Ans. 135 grams.

6. In 77.2 grams of gold how many cubic centimeters, gold being 19.3 times as heavy as water?

555.

Ans. 4cu centim

METRIC MEASURES LEGALIZED BY THE UNITED STATES WITH THEIR EQUIVALENTS NOW IN USE.

NOTE.-Although the equivalents here given are not entirely accurate, they are those which are established by Congress for use in legal proceedings, and in the interpretation of contracts, and are sufficiently exact for all practical purposes.

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REDUCTION OF NUMBERS IN THE METRIC SYSTEM TO EQUIVALENTS NOW IN USE.

556. ILL. Ex. In 5 meters how many inches? how many

feet?

OPERATION.

39.37 X 5

12

EXPLANATION. Since 1 meter equals 39.37 inches, 5 meters must equal 5 times 39.37 inches, and

= 16.40 ft., Ans. since 12 inches equal 1 foot, there

must be as many feet as there are times 12 in 5 times 39.37, which is 16.40 times.

EXAMPLES.

Ans. 16.40 ft.

1. In 1 meter, 2 decimeters, how many feet? Ans. 3.937 ft. 2. In 25 millimeters how many inches?

Ans. .985 in.

3. How many inches long is a silkworm that measures 5.2 centimeters in length? Ans. 2.047 in.+. 4. What is the height of a person in feet and inches whose height is 1 meter, 728 millimeters?

Ans. 5 ft. 8 in.+.

Ans. 2511.6 sq. yds.

5. In 21 ares how many square yards?
6. In a field of 7 hectares, 2 ares, how many acres?

Ans. 17.346 acres+.

7. In 32 centares how many square yards?

Ans. 38.272 sq. yds.

8. In 12 steres of wood how many cubic yards? how many Ans. 15.696 yds.; 3.31 cords+. Ans. 6340.08 gal.

cords?

9. In 24 kiloliters how many gallons? 10. How many gallons of vinegar may be put into a cask

containing 8 dekaliters, 2 liters?

Ans. 21.66 gals.+.

11. In 2 hectoliters how many bushels and pecks?

Ans. 5 bu. 2.7 pks.

12. In 23 kilograms how many pounds avoirdupois?

Ans. 50.7 lbs.+.

13. In 28 kilograms, 7 hectograms, how many pounds avoirdupois?

Ans. 41.22 lbs.+.

14. In 27 tonneaux how many tons?

Ans. 29.762 tons +.

557. The following are some of the measures in common use, with their equivalents in measures of the metric system :

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A yard
A rod
A mile
A sq. inch
A sq. foot

A sq. yard
A sq. rod

An acre
A sq. mile
A cu. inch
A cu. foot

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A pound av.
A ton

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A bushel

An ounce Troy

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REDUCTION OF MEASURES NOW IN USE TO EQUIVALENTS IN THE METRIC SYSTEM.

558. ILL. EX. In 5 feet how many meters?

OPERATION.

EXPLANATION. Since 1 foot equals

.3048 meters, 5 feet must equal 5 times

.3048 × 51.524m, Ans. .3048 meters, which is 1.524 meters.

EXAMPLES.

Ans. 1.524.

1. In 2 rods how many meters?

2. In 25 sq. yards how many sq. meters?

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Ans. 3.048m.

7. In 3 yards 1 foot how many meters?
8. In 2 bushels 3 pecks how many liters?

9. In 8 pounds 7 ounces how

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For a fuller treatment of this subject see Walton's pamphlet

edition of "The Metric System of Weights and Measures.”

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