Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση

1. How many places are there in the first period of decimals?

There are but two.

2. Name them.

3. How many in each of the other periods?

4. What is the fractional unit of the first place? One tenth.

5. What is the fractional unit of the second place? One hundredth.

6. What is the fractional unit of the third place? One thousandth.

Let the pupil explain in the same manner the unit of each place of the decimal numeration table, and then the unit of each place, and the readings of the following examples.

[blocks in formation]

OF DENOMINATE NUMBERS.

LESSON I.

1. What are simple numbers?

Simple numbers express a collection of units of the same kind, without expressing the particular value of the unit.

2. What is a denominate number?

A denominate number expresses the kind of unit which is considered.

3. Give an example of a denominate number.

Six dollars is a denominate number, in which the unit is 1 dollar.

4. What is the unit of 4 yards of cloth? Is this a denominate or simple number?

LESSON II.

Federal Money.

1. What is the currency of the United States? Federal money is the currency of the United States.

2. What are its denominations?

Its denominations, or names, are Eagles, Dollars, Dimes, Cents, and Mills.

3. Of what are the coins of the United States made?

The coins of the United States are of gold, silver,

and copper.

4. Which are gold?

5. Which are silver?

The dollar, half-dollar, quarter-dollar, dime, and half-dime.

6. Which are copper?

The cent and half-cent.

7. Repeat the table.

TABLE.

10 mills, marked m. make 1 cent, marked ct.

[blocks in formation]

8. How are the parts of a dollar sometimes expressed? The parts of a dollar are sometimes expressed fractionally, as in the following table:

[blocks in formation]

1. What are the denominations of English money? The denominations of English money are guineas, pounds, shillings, pence, and farthings.

2. Repeat the table.

TABLE.

4 farthings, far. make 1 penny, marked d.

[blocks in formation]
[ocr errors]

LESSON IV.

Avoirdupois Weight.

1. What is the standard`avoirdupois pound of the United States?

The standard avoirdupois pound of the United States, as determined by Mr. Hassler, is the weight of 27.7015 cubic inches of distilled water.

2. For what is this weight used?

By this weight are weighed all coarse articles, such as hay, grain, chandlers' wares, and all the metals, except gold and silver.

3. What is the meaning of the terms gross and net?

Gross weight is the weight of the goods, with the boxes, casks, or bags in which they are contained. Net is the weight of the goods only; or what remains after deducting from the gross weight the weight of the boxes, casks, or bags.

4. What is a hundred weight?

According to the old method of weighing, which was adopted from the English system, 112 pounds make what was called one hundred weight.

5. How are goods now generally bought and sold? At the present time, the merchants in our principal cities buy and sell by the 100 pounds.

6. How is the table to be read?

TABLE.

16 drams, dr. make 1 ounce, marked 02.

[blocks in formation]

LESSON V.

Troy Weight.

1. What things are weighed by Troy weight? Gold, silver, jewels, and liquors, are weighed by this weight.

2. What is the standard pound?

The standard Troy pound of the United States, as determined by Mr. Hassler, is the weight of 22.794377 cubic inches of distilled water. Hence, it is less than the pound avoirdupois.

3. What are its denominations?

Its denominations are pounds, ounces, pennyweights, and grains.

4. Repeat the table.

TABLE.

24 grains, gr. make 1 pennyweight, marked pwt.

[merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small]

1. What is the use of the Apothecaries' weight? This weight is used by apothecaries and physicians in mixing their medicines.

2. What are its denominations?

Its denominations are pounds, ounces, drams, scruples, and grains.

3. Of what value are the pound and the ounce ? The pound and ounce are the same as the pound

« ΠροηγούμενηΣυνέχεια »