on me.

"You know that I am not invulnerable unless I have a talisman Unfortunately, I have left it at Algiers." The marabout began to laugh incredulously. "Nevertheless," I went on to say, "if I remain in prayer for six hours, I shall be able to make myself invulnerable to your pistol, even though I have no talisman. To-morrow morning, at eleven o'clock, I shall let you fire at me before all these Arabs, who are witnesses of your challenge." Bou Allem, astonished to hear me make such a promise, came up and asked me in a low tone if I was speaking seriously, and if he should invite the Arabs to come the next day. I told him I was. I need not say I did not spend the night in prayers, but I worked for two hours to make myself invulnerable, and then satisfied with my success, I went to sleep with a great deal of pleasure, for I was horribly tired. We breakfasted before eight o'clock, the next morning; our horses were saddled, and our escort was waiting the signal of departure, which was to take place immediately after the famous experiment. The same persons who were present at the challenge the day before, were at the rendezvous, and a great many other Arabs who had heard of what was to take place, had come to witness it.

The pistols were brought. I made them observe the touchhole was clear. The marabout put a good load of powder in the pistol and rammed it down well. I chose a ball from among the balls brought, I ostensibly put it in the pistol and rammed it thoroughly. The marabout kept a good eye on me: his honor was at stake. The second pistol was loaded as the first had been, and now came the trying moment. Trying indeed it was for everybody. For the Arabs around, uncertain how the experiment would end; for my wife, who had in vain begged me not to try the experiment which she was afraid of-and I confess it, trying for me, as my new trick was based on none of the expedients I had hitherto used, and I was afraid of some mistake, some treachery, some accident. Nevertheless, I stood fifteen paces in front of the marabout, without exhibiting the

least emotion. The marabout instantly took up one of the pistols, and at the given signal he aimed deliberately at me. He fired. I caught the ball in my teeth. More irritated than ever, the marabout ran to snatch up the other pistol; I was quickest and I seized it. "You failed to draw blood from me," said I to him; "now look, I am going to draw blood from that wall yonder." I fired at a wall which had just been whitewashed; instantly a large clot of blood was seen on it. The marabout went up to it, put a finger on it, tasted it, and satisfied himself it was really blood. His arms fell down at his side, he hung his head, he was overcome. It was evident he doubted now of everything, even of the Prophet. The Arabs raised their hands to Heaven, muttered prayers, and looked at me with dread.

This trick, however curious it may seem, is managed easily enough. I shall describe it. As soon as I was alone in my chamber, I took out of my pistol-case (which I carry with me wherever I go) a ball-mould. I took a card, turned up its corners and made a sort of recipient of it, in which I placed a lump of stearine, taken from one of the candles in the room. As soon as the stearine was melted, I mixed a little lamp-black with it—which I obtained by holding a knife over a lighted candle and then I poured this composition into my ball-mould. If I had allowed the liquid stearine to become entirely cold, the ball would have been solid; but after ten or twelve seconds I reversed the mould, and the portion of the stearine which was not yet solid flowed out and left a hollow ball in the mould. This, by the way, is the mode in which the hollow candles used in the churches are made; the thickness of the sides depends on the time the melted stearine or wax is left in the mould. I wanted a second ball. I made it a little thicker than the first. I filled it with blood, and I closed the aperture with a drop of stearine. An Irishman had showed me years before, how to extract blood from the thumb without pain: I adopted his trick to fill my ball with blood. It is hard to believe how nearly these

projectiles of stearine, colored with lamp-black, look like lead: they will deceive anybody, even when examined quite closely. The reader now clearly sees through the trick. While exhibiting the lead bullet to the spectators, I changed it for my hollow ball, and this last I ostensibly placed in the pistol. I rammed it down, to break the stearine into small pieces, which could not reach me at fifteen paces. As soon as the pistol was discharged, I opened my mouth and exhibited the lead ball between my teeth. The second pistol contained the ball filled with blood, which was broken to pieces on the wall, where it left the spot of blood, while the pieces of stearine could no where be found. This is the whole mystery.

SIR HUMPHRY DAVY ON WEATHER-OMENS.
In his shepherd's calling he was prompt,
And watchful more than ordinary men.
Hence had he learned the meaning of all winds,

Of blasts of every tone; and oftentimes,
When others heeded not, he heard the South
Make subterraneous music, like the noise

Of bagpipes upon distant Highland hills.

THE late Sir Humphry Davy, one of the most successful modern explorers of the secrets of nature, was not above attending to, and explaining, the "weather-omens" which are derived from popular observation.

In his Salmonia he has the following dialogue between Haliens, (a fly-fisher,) Poietes, (a poet,) Physicus, (a man of science,) and Ornither, (a sportsman):

Poiet. I hope we shall have another good day to-morrow, for the clouds are red in the west.

Phys.—I have no doubt of it, for the red has a tint of purple. Hal.-Do you know why this tint portends fine weather? Phys.-The air, when dry, I believe, refracts more red, or heat-making rays; and as dry air is not perfectly transparent, they are again refracted in the horizon. I have generally observed a coppery or yellow sunset to foretell rain; but as an indication of wet weather approaching, nothing is more certain than a halo round the moon, which is produced by precipitated water; and the larger the circle, the nearer the clouds, and consequently the more ready to fall.

Hal.-I have often observed that the old proverb is correct,― A rainbow in the morning is the shepherd's warning;

A rainbow at night is the shepherd's delight.

Can you explain this omen?

Phys.-A rainbow can only occur when the clouds containing or depositing the rain are opposite the sun, and in the evening the rainbow is in the east, and in the morning in the west; and as our heavy rains, in this climate, are usually brought by the westerly wind, a rainbow in the west indicates that the bad weather is on the road, by the wind, to us; whereas the rainbow in the east proves that the rain in these clouds is passing from us.

Poiet.-I have often observed that when the swallows fly high, fine weather is to be expected or continued; but when. they fly low, and close to the ground, rain is almost surely approaching. Can you account for this?

Hal.-Swallows follow the flies and gnats, and flies and gnats usually delight in warm strata of air; and as warm air is lighter, and usually moister, than cold air, when the warm strata of air are high, there is less chance of moisture being thrown down from them by the mixture with cold air; but when the warm and moist air is close to the surface, it is almost certain that, as the cold air flows down into it, a deposition of water will take place.

Poiet. I have often seen sea-gulls assemble on the land, and have almost always observed that very stormy and rainy wea ther was approaching. I conclude that these animals, sensible of a current of air approaching from the ocean, retire to the land to shelter themselves from the storm.

Orn.-No such thing. The storm is their element, and the little petrel enjoys the heaviest gale, because, living on the smaller sea-insects, he is sure to find his food in the spray of a heavy wave; and you may see him flitting above the edge of the highest surge. I believe that the reason of this migration of sea-gulls, and other sea-birds, to the land, is their security of finding food; and they may be observed at this time feeding greedily on the earth-worms and larvæ driven out of the ground by severe floods; and the fish, on which they prey in fine weather in the sea, leave the surface, and go deeper, in storms. The search after food, as we have agreed on a former occasion, is the principal cause why animals change their places. The different tribes of the wading birds always migrate when rain is about to take place; and I remember once, in Italy, having been long waiting, in the end of March, for the arrival of the double snipe in the Campagna of Rome, a great flight appeared on the 3d of April, and the day after heavy rain set in, which greatly interfered with my sport. The vulture, upon the same principle, follows armies; and I have no doubt that the augury of the ancients was a good deal founded upon the observation of the instincts of birds. There are many superstitions of the vulgar owing to the same source. For anglers, in spring, it is always unlucky to see single magpies; but two may be always regarded as a favorable omen; and the reason is, that in cold and stormy weather one magpie alone leaves the nest in search of food, the other remaining sitting upon the eggs or the young ones; but when two go out together it is only when the weather is warm and mild, and favorable for fishing.

Poiet. The singular connections of causes and effects to which you have just referred, make superstition less to be