The Perfect Crime

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Suspect A has shot a man through the heart during the last half minute. But Suspect B shot him through the heart during the preceding 1/4 minute, Suspect C shot him through the heart during the 1/8 minute before that, and so on. Assuming that a bullet through the heart kills a man instantly, the victim must already have been dead before any given suspect shot him.

Indeed, notes José Benardete, he cannot be said to have died of a bullet wound.

A New Outlook

A correspondent of the Manchester Sporting Chronicle, thinking that his horse was short-sighted, had his eyes examined by an oculist, who certified that the horse had a No. 7 eye and required concave glasses. These were obtained and fitted on to the horse’s head. At first the horse was a little surprised, but rapidly showed signs of the keenest pleasure, and he now stands all the morning looking over the half-door of his stable with his spectacles on, gazing around him with an air of sedate enjoyment. When driven his manner is altogether changed from his former timidity; but if pastured without his spectacles on, he hangs about the gate whinnying in a plaintive minor key. If the spectacles are replaced he kicks up his heels and scampers up and down the pasture with delight.

British Veterinary Journal, March 1888

Spear Fight

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A puzzle by Henry Dudeney:

A lady is accustomed to buy from her greengrocer large bundles of asparagus, each twelve inches in circumference. The other day the man had no large bundles in stock, but handed her instead two small ones, each six inches in circumference. “That is the same thing,” she said, “and, of course, the price will be the same.” But the man insisted that the two bundles together contained more than the large one, and charged a few pence extra. Which was correct — the lady or the greengrocer?

Click for Answer

“The Research Man’s Prayer”

Help me be MANIC so I may be joyous though the results are equivocal.

Help me be DEPRESSIVE for when a prediction is verified, I must know that it will not later be confirmed.

Help me be SADISTIC so I suffer not though the subjects be sorely anguished.

Help me be MASOCHISTIC for even the most obstinate experimental animal should be a pleasure to me.

Help me be PSYCHOPATHIC to quiet the guilt when I tell loved ones that the experiment is going well.

Help me be SCHIZOPHRENIC to sustain myself by finding hopeful trends in random data.

Help me be PARANOID so I can see in the hostile attitudes of others the supremacy of my own work.

Help me to have ANXIETY ATTACKS so that even on holidays I find myself toiling in the laboratory.

And finally,

Help my wife get a job! for when I cross over the shadowy border of normalcy, somebody will have to support the kids. Amen.

— R.A McCleary in the Worm Runner’s Digest, November 1960

Bird Songs

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In an 1891 feature, the Strand attempted to notate the songs of various English birds. The nightingale, shown here, “shares with the lark the honours of poesy. Though sometimes dwelling for minutes on a strain composed of only two or three melancholy tones, beginning with a mezza voce, it swells gradually, by a most perfect crescendo, to the highest point of strength, and ends with a dying cadence.”

The songs of birds have long inspired human composers. In 1934 the Rev. K.H. MacDermott, an associate of the Royal College of Music, wrote to the Times:

For many years each spring I have tested the cuckoo’s notes with a piano, and have found that they are always within a tone of D and B, or D and B flat (treble stave). It is of interest to observe that Beethoven, a great lover of birds, when he introduced the imitation of the cuckoo at the end of the second movement of his Pastoral Symphony, gave the two notes D and B flat, to be played by the clarionet. As Beethoven was at the time he composed that work (1808) completely deaf one wonders whether it was by chance he selected the correct notes, or merely because they fit in with the key of the movement, or whether his memory of the bird’s song had survived after he had been unable to hear it for some years. If the latter, it is fascinating to realize that the cuckoo has not altered the pitch of his notes for over a century.

Beethoven used this technique more than once. Ornithologist and bioacoustics expert Luis Baptista of the California Academy of Sciences compared the call of the white-breasted wood wren to the famous opening bars of the composer’s Fifth Symphony:

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And if humans imitate birds, Baptista also found that “when birds compose songs they often use the same rhythmic variations, pitch relationships, permutations, and combinations of notes as human composers,” noted Patricia Gray, head of the National Academy of Sciences’ Biomusic program, in Science in 2001. “Thus, some bird songs resemble musical compositions; for example, the canyon wren’s trill cascades down the musical scale like the opening of Chopin’s ‘Revolutionary’ Etude.”

Indeed, birdsong reflects every elementary rhythmic effect found in human music, Gray wrote. “There are interval inversions, simple harmonic relations, and retention of melody with change of key.” Many birds transpose motifs into different keys, and some pitch their songs to the same scale as Western music.

Modern composers have narrowed the gap still further. Olivier Messiaen’s 1952 flute piece Le merle noir was based entirely on the song of the blackbird, and his orchestral work Réveil des oiseaux is built almost entirely on the songs one hears at daybreak in the Jura mountains of the composer’s native France. Critic Paul Griffiths said he considered Messiaen a more conscientious ornithologist than any previous composer, and a more musical observer of birdsong than any previous ornithologist.

This must end somewhere, though. If we’ve been emulating birds’ music, now they’re emulating our technology.

Inventory

This self-describing (and otherwise pointless) sentence contains exactly 95 spaces, 66 apostrophes, 1 open parenthesis, 1 close parenthesis, 40 commas, 1 hyphen, 1 period, 4 ‘0’s, 13 ‘1’s, 9 ‘2’s, 7 ‘3’s, 8 ‘4’s, 5 ‘5’s, 4 ‘6’s, 4 ‘7’s, 4 ‘8’s, 4 ‘9’s, 2 ‘O’s, 2 ‘T’s, 12 ‘a’s, 2 ‘b’s, 10 ‘c’s, 7 ‘d’s, 21 ‘e’s, 3 ‘f’s, 4 ‘g’s, 8 ‘h’s, 13 ‘i’s, 7 ‘l’s, 5 ‘m’s, 16 ‘n’s, 12 ‘o’s, 10 ‘p’s, 8 ‘r’s, 53 ‘s’s, 9 ‘t’s, 2 ‘u’s, 2 ‘w’s, 3 ‘x’s, and 3 ‘y’s, including a single Oxford comma.

(Thanks, Chris.)

The Componium

Paris witnessed a startling demonstration in 1824: a machine that could simulate a musical improvisation, producing endless variations on a given theme. “Its ingenious inventor, M. Winkel, of Amsterdam, has given it the astonishing faculty of imitating extemporaneous performance, and of reducing into harmonic form all the possible combinations, which the most bold and fertile imagination could produce,” noted the Harmonicon. When Winkel operated the Componium before an audience of skeptical musicians, it “produced upon the auditory an effect difficult to be described. The astonishment of the hearers was at its height when, after having executed a march, with variations by Moscheles, the instrument was left to follow its own inspirations: the applause was loud and unanimous, and some exclaimed that it was altogether miraculous.”

Incredulous that such an effect could be produced by an automaton, the attendees asked two of their number to examine the mechanism and make a final report. These two declared that, while the effect was “marvelous,” no trickery was involved:

When this instrument has received a varied theme, which the inventor has had time to fix by a process of his own, it decomposes the variations of itself, and reproduces their different parts in all the orders of possible permutation, the same as the most capricious imagination might do; it forms successions of sound so diversified, and produced by a principle so arbitrary, that even the person the best acquainted with the mechanical construction of the instrument, is unable to foresee at any given moment the chords that are about to be produced.

A single example will suffice to show the freedom of choice that is permitted by it. None of the airs which it varies lasts above a minute; could it be supposed that but one of these airs was played without interruption, yet, through the principle of variability which it possesses, it might, without ever resuming precisely the same combination, continue to play not only during years and ages, but during so immense a series of ages that, though figures might be brought to express them, common language could not.

— J.B. Biot, de l’Academie des Sciences, and Catel, de l’Academie des Beaux-arts, Paris, Feb. 2, 1824

But a dazzling effect can be produced by a relatively simple mechanism. In 1770 an English publisher produced a pamphlet with the intriguing title A Tabular System Whereby the Art of Composing Minuets Is Made So Easy That Any Person, Without the Least Knowledge of Musick, May Compose Ten Thousand, All Different, and in the Most Pleasing and Correct Manner. A contemporary reviewer found that “a quantity of cards, each holding a sequence of notes and arranged at will, is the whole secret of so prolific a composition.”

Double Trouble

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Image: Wikimedia Commons

The properties of the simple Möbius strip are well understood: Take a strip of paper, give it a half-twist, and tape the ends together. Now an ant can traverse the full length of the loop, on both sides, and return to its starting point without ever crossing an edge.

But try doing the same thing with two strips of paper. Pair the strips, give them a half-twist, and connect the ends. Now it’s possible to insert a toothpick between the bands and to draw the toothpick along the entire length of the loop, which seems to show that they’re two distinct objects. But if you draw a line along either strip, starting anywhere, you’ll find that you traverse both strips and return to your starting point.

“I have known people to ponder this for hours while listening to Pink Floyd without ever fully appreciating what they have beheld,” writes Clifford Pickover in The Möbius Strip. Are you holding one object or two?