Singing Sand

In the summarized proceedings of the September 1884 meeting of the American Association for the Advancement of Science, Trinity College chemist H. Carrington Bolton and Columbia College geologist Alexis A. Julien reported on the “musical sand” at Manchester-by-the-Sea, Mass.:

“The character of the sounds obtained by friction on the beach is decidedly musical and we have been able to indicate the exact notes on a musical staff. The shrillness and lowness of note depend chiefly on the quantity of sand disturbed; by plunging both hands into the sand and bringing them together quickly with a swoop a large quantity of the sand vibrates and we hear a tone of which the dominant note is:”

http://books.google.com/books?id=WFUWAAAAYAAJ

“By stroking the sand nearer the surface and with less force very high notes are heard somewhat confused. The following were heard at different times.”

http://books.google.com/books?id=WFUWAAAAYAAJ

“By rubbing firmly and briskly a double handful of the sand several notes on a rising scale are heard, the notes rising as the quantity of sand between the hands diminishes. We do not hear each note of the scale separately, but the ear receives an impression something like that formed by sliding a finger up a violin string at the same time that the bow is drawn.”

http://books.google.com/books?id=WFUWAAAAYAAJ

“The range is very remarkable and decided.”

Bolton and Julien found that “sonorous sand” was “of very common occurrence and widely distributed” — 65 of the 85 U.S. life-saving stations with which they corresponded reported that they knew of such sand. “The number is constantly increasing as the reports from keepers of life saving stations arrive.”

Yablo’s Paradox

All the statements below this one are false.
All the statements below this one are false.
All the statements below this one are false.
All the statements below this one are false.
All the statements below this one are false.

These statements can’t all be false, because that would make the first one true, a contradiction. But neither can any one of them be true, as a true statement would have to be followed by an infinity of false statements, and the falsity of any one of them implies the truth of some that follow. Thus there’s no consistent way to assign truth values to all the statements.

This is reminiscent of the well-known liar paradox (“This sentence is false”), except that none of the sentences above refers to itself. MIT philosopher Stephen Yablo uses it to show that circularity is not necessary to produce a paradox.

“Evils of Railroads”

A canal stockholder’s argument against railways, from the Vincennes, Ind., Western Sun, July 24, 1830:

He saw what would be the effect of it; that it would set the whole world a-gadding. Twenty miles an hour, sir! Why, you will not be able to keep an apprentice-boy at his work: every Saturday evening he must take a trip to Ohio, to spend the Sabbath with his sweetheart. Grave plodding citizens will be flying about like comets. All local attachments must be at an end. It will encourage flightiness of intellect. Veracious people will turn into the most immeasurable liars; all their conceptions will be exaggerated by their magnificent notions of distance. ‘Only a hundred miles off! Tut, nonsense, I’ll step across, madam, and bring your fan!’ ‘Pray, sir, will you dine with me to-day at my little box at Alleghany?’ ‘Why, indeed, I don’t know — I shall be in town until twelve. Well, I shall be there; but you must let me off in time for the theatre.’ And then, sir, there will be barrels of pork, and cargoes of flour, and chaldrons of coals, and even lead and whiskey, and such like sober things, that have always been used to sober travelling, whisking away like a set of skyrockets. It will upset all the gravity of the nation. If two gentlemen have an affair of honour, they have only to steal off to the Rocky Mountains, and there no jurisdiction can touch them. And then, sir, think of flying for debt! A set of bailiffs, mounted on bomb-shells, would not overtake an absconded debtor — only give him a fair start. Upon the whole, sir, it is a pestilential, topsy-turvy, harum-scarum whirligig. Give me the old, solemn, straightforward, regular Dutch canal — three miles an hour for expresses, and two for jog-and-trot journeys — with a yoke of oxen for a heavy load! I go for beasts of burthen: it is more primitive and scriptural, and suits a moral and religious people better. None of your hop-skip-and-jump whimsies for me.

Public Servant

During the War of 1812, the Declaration of Independence hung in the office of Stephen Pleasonton, an auditor in the State Department. When word came that the British might march on Washington, Secretary of State James Monroe ordered Pleasonton to safeguard the department’s important books and papers, so Pleasonton ordered linen bags made and began filling them with documents.

As he was doing this, Secretary of War John Armstrong Jr. passed through the building and remarked that the alarm was unnecessary; he did not believe that the British planned to attack the city.

“Had he followed the advice of the Secretary of War, an irreparable loss would have been sustained,” noted the New York Times in 1905. “For the papers which Mr. Pleasonton had placed in the coarse linen bags comprised the secret journals of Congress, then not published; the correspondence of Gen. Washington, his commission, resigned at the close of the war; the correspondence of Gen. Greene and other officers of the Revolution, a well as laws, treaties, and correspondence of the Department of State, from the adoption of the Constitution down to that time.”

Pleasonton had the bags carted to a grist mill on the Virginia side of the Potomac. As he was leaving his office, he caught sight of the Declaration hanging on his wall. He took it down, cut it out of its frame, and carried it away with the other papers.

Feeling that even the grist mill was too vulnerable, Pleasonton removed the bags a further 35 miles to Leesville, where he stored them in an empty house. “Worn out with his labors, Mr. Pleasonton states in a letter, he retired early to bed that night and slept soundly. Next morning he was informed by the people of the little tavern where he had stayed that evening that they had seen during the night, the same being the 24th of August, a large fire in the direction of Washington, which proved to be the light from the public buildings, which the enemy had set on fire and burned to the ground.”

In a Word

http://commons.wikimedia.org/wiki/File:Houdini_and_Lincoln.jpg

transpicuous
adj. transparent

In 1922, magician Harry Price published “Cold Light on Spiritualistic Phenomena” in the Journal of the Society for Psychical Research, showing that so-called “spirit photographs” could be created using simple double exposures. In support of the exposé, Harry Houdini had himself photographed with Abraham Lincoln.

Cool Shoes

http://www.google.com/patents/about?id=DgMfAAAAEBAJ

Israel Siegel’s “gravity-powered shoe air conditioner,” patented in 1994, fits bellows into the heel of each of a pair of shoes, so that the natural act of walking pumps a refrigerant through two networks of heat exchange coils, one operating as a heat-absorbing evaporator and the other as a heat-delivering condenser.

Depending on how these networks are arranged, the shoe can serve as a foot cooler or a foot warmer.

Finding Mates

A remarkable spelling trick by American magician Howard Adams:

From a deck of cards choose five cards and their mates. A card’s mate is the card of the same value and color; for example, the mate of the five of clubs is the five of spades.

Arrange the cards in the order ABCDEabcde, where ABCDE are the chosen cards and abcde are the mates. Cut this packet as many times as you like, then deal five cards onto the table, reversing their order. Place the remaining five cards beside them in a second pile.

Now spell the phrase LAST TWO CARDS MATCH. As you say “L,” choose either pile at random and transfer a card from the top to the bottom. Do the same for A, S, and T. Now remove the top card from each pile and set them aside as a pair.

Perform the same procedure as you spell TWO, CARDS, and MATCH. When you’re finished, two cards will remain on the table. Not only do these cards match, but so do each of the other pairs!

Overdue

In May 1919, Canadian flying ace Mansell Richard James won an air race from Atlantic City to Boston in a $1,000 competition sponsored by the Boston Globe.

At 11 a.m. on May 29 he departed Boston to return to Atlantic City.

At 12:30 p.m. a group of picknicking schoolchildren saw his Sopwith Camel flying smoothly southward over Hancock, Ct., at an altitude of about 5,000 feet.

He was never seen again. Despite numerous rewards and extensive searching, no trace of James has ever been found.