Summary

Portrait of Professor Hoffmann Professor Hoffmann Modern Magic: A Practical Treatise on the Art of Conjuring

The loquacious gentleman is pretty sure to question the fact, or is on some pretence selected to make trial of its truth. The performer places him directly facing the audience, and after himself once more sounding the whistle, hands it to him in order to try his skill. He blows vigorously, but in vain; not a sound can he produce, but his mouth and lips gradually become obscured with a white or black dust. He finally retires to his seat amid the laughter of the audience, and generally much less disposed to make himself prominent during the remainder of the evening.
Source: Gutenberg

Portrait of Professor Hoffmann Professor Hoffmann Modern Magic: A Practical Treatise on the Art of Conjuring

Again, you hold the edges to the candle, but this time, as if by accident, you let the flames fairly catch hold of the handkerchief, which you are compelled to drop upon a plate or tray, and to let it burn itself out. For a moment, you feign to be embarrassed, and the audience are half inclined to believe that you have made a mistake, and your trick has failed
Source: Gutenberg

Portrait of Professor Hoffmann Professor Hoffmann Modern Magic: A Practical Treatise on the Art of Conjuring

You spread the cards before the drawer, allowing him perfect freedom of choice, as, of course, whatever card he draws must necessarily be a queen of diamonds. You ask him to be good enough to say what the card he has drawn is, and on being told that it is a queen, you say, “Then, by virtue of my magic power, I order that the four cards now on the table change to queens. Pray observe that I do not meddle with them in any way. I merely touch each with my wand, so! Will some one kindly step forward, and bear witness that the change has really taken place.”
Source: Gutenberg

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