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 examin