Part III. Air, Water, Heat, Light, &c. By WORTHINGTON HOOKER, M.D.

Illustrated. The Three Parts complete in One Volume, Small 4to, Half

Leather, $1.12; or, separately, in Cloth, Part I., 45 cents; Part II.,

48 cents; Part III., 48 cents.

* * * * *

A beautiful and useful work. It presents a general survey of the kingdom

of nature in a manner adapted to attract the attention of the child, and

at the same time to furnish him with accurate and important scientific

information. While the work is well suited as a class-book for schools,

its fresh and simple style cannot fail to render it a great favorite for

family reading.

The Three Parts of this book can be had in separate volumes by those who

desire it. This will be advisable when the book is to be used in

teaching quite young children, especially in schools.

* * * * *

Published by HARPER & BROTHERS, New York.

_Sent by mail, postage prepaid, to any part of the United States, on

receipt of the price._

[Illustration]

THE WOMBAT.

A Mandarin owned a wombat

That grew so exceedingly fat

That, when it would laugh

'Twould most break in half,

And tickle the soul of the cat.

* * * * *

=A Dog that could Cipher.=--The well-known English astronomer Dr.

Huggins had a mastiff that bore the name of Kepler. This dog possessed

many rare gifts, and amongst these was one which he was always ready to

exercise for the entertainment of visitors. At the close of luncheon or

dinner Kepler used to march into the room, and set himself down at his

master's feet. Dr. Huggins then asked him a series of arithmetical

questions, which the dog invariably solved without a mistake. Square

roots were extracted off-hand with the utmost readiness and promptness.

If asked what was the square root of nine, Kepler replied by three

barks; or, if the question were the square root of sixteen, by four.

Then various questions followed, in which much more complicated

processes were involved--such, for instance, as "Add seven to eight,

divide the sum by three, and multiply by two." To such a question as

that Kepler gave more consideration, and sometimes hesitated in making

up his mind as to where his barks ought finally to stop. Still, in the

end, his decision was always right. But how did he do it? may be asked.

The solution is easily furnished: the proper answer was unconsciously

suggested to the dog by his master. The wonderful fact is that Kepler

had acquired the habit of reading in his master's eye or countenance

some indication that was not known to Dr. Huggins himself. The case was

one of the class which is distinguished by physiologists as that of

expectant attention. Dr. Huggins was himself engaged in working out

mentally the various stages of his arithmetical processes as he

propounded the numbers to Kepler, and being, therefore, aware of what

the answer should be, expected the dog to cease barking when that number

was reached, and that expectation suggested to his own brain the

unconscious signal which was caught by the quick eye of the dog.

SOLUTION TO SQUARE PUZZLE IN No. 46.

[Illustration]

Start with, your pencil from figure 1 and draw a line to 2, from there

to 3, and so on from number to number till you have completed the

figure.

CHARADE.

BY H.

Up in the air I'm lifted high

Above the worshippers below,

Yet near their hearts I always lie,

As reverently they come and go.

I've many forms, like Proteus old,

But tell forever the same tale;

Men gaze, and see by me foretold

What sometimes makes their cheeks grow pale.

And through my secret winding course

There ebbs and flows a mighty tide;

Alas! what pangs of keen remorse

Are his who turns that stream aside!

Yet in the gay and festive throng

I am what many a maid may be,

While in the pauses of the song

Her lover pleads his cause in me.

Sometimes, a ship, I face the storm;

Sometimes beneath the earth I bide,

And then its beauty men deform

To find the secret that I hide.

But in the air, or in the breast,

Whate'er my form, like beast or bird,

I keep my secret from the rest--

By man my voice is never heard.

* * * * *

The quicksilver mines of Guancavelica, in Peru, are of a prodigious

depth. In their profound abysses are seen streets, squares, and a chapel

where religious mysteries are celebrated on all festivals. Thousands of

flambeaux are continually burning in it. The miners suffer terribly from

the mercurial vapors, which produce convulsions and paralysis. Thousands

of workmen were condemned to forced labor in these frightful

subterranean regions. These mines were discovered about 1566 by Henry

Garces, a Portuguese, who was one day examining a red earth used by the

Indians for making paint. He remembered that in Europe quicksilver was

extracted from cinnabar, and with this earth he made some experiments

which led to the opening of this mine.

[Illustration: QUACK!]

[Illustration: QUACK! QUACK!]

[Illustration: QUACK! QUACK! QUACK!]

End of Project Gutenberg's Harper's Young People, October 5, 1880, by Various

Harper's Young People, October 5, 1880 An Illustrated Weekly · 第 3 / 3 章