December 2024: Science History from 50, 100 and 150 Years Ago

Alcohol in space; basking in the limelight

12 Ace cards, with multiple hearts, spades, clovers and diamonds in red and black

1974, How Many Aces of Spades?: “After a brief glance at this display most people report seeing three. Actually there are five. Because people expect aces of spades to be black, they tend to miss the atypical red ones. Thus do prior conditioning and experience influence perception.”

Scientific American, Vol. 231, No. 6; December 1974

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1974

More Alcohol Found in Space

“Is there intelligent life elsewhere in the universe? Positive evidence facetiously adduced was that whereas methyl alcohol had been discovered in interstellar space, ethyl alcohol (the potable kind) had not. Clearly someone had consumed the stuff. But in October a group of [researchers] used a highly sensitive spectrometer to investigate the dense cloud of gas and dust designated Sagittarius B2, a rich source of most of the known molecules in space. They discovered weak radio emission at the wavelength of 3.3 millimeters [and] identified it as radiation from ethyl alcohol. Ethyl alcohol, composed of nine atoms (C2H5OH), is one of the largest and most complex molecules now known to exist in interstellar space. The substance is spread in a thin vapor throughout Sagittarius B2, which is some 50 light-years in diameter. One calculation shows that, if the ethyl alcohol were condensed, it would come to 1028 fifths of a gallon at 80 proof. Potability, however, might be a problem; the alcohol is heavily contaminated with substances such as hydrogen cyanide, formaldehyde and ammonia. The discovery brings the total number of different kinds of molecules detected in space to 32.”


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1924

“Methanol” Is a Safer Name

“Some time ago attention was called to the coinage of this word to designate methyl alcohol, commonly called wood alcohol. The purpose was to provide a trade designation which would not involve the word ‘alcohol’ and consequently detract from the use of this material as a beverage. In one year in one of our larger cities there were 54 deaths traceable to the internal use of wood alcohol. As soon as the word ‘methanol’ had been accepted by the trade and users, the number of deaths in the same locality dropped to less than 20 in a year. It is believed that a great deal more has been accomplished by this ingenious device than would have been possible by any campaign of education or legal enforcements.”

Chromosomes, Not Jelly

“With the microscopic study of the cell and its constituent parts, and the rediscovery of Mendel’s law in 1900, two formerly independent lines of investigation have reinforced each other. We now know that living cells are not mere drops of jelly; each contains a complexity of parts, one of which is the easily dyed speck called the nucleus. The nucleus in turn contains a number of highly important microscopic constituents called chromosomes, of which each species of plant or animal possesses a characteristic number. Although the nature and behavior of these little chromosome particles are not fully understood, it is quite evident that they have very much if not everything to do with determining the great facts of heredity.”

1874

Paintings Bask in the Limelight

“The new and celebrated painting ‘Roll Call’ [by Lady Elizabeth Butler] is now nightly exhibited in London to large audiences, by means of the oxyhydrogen light, or lime light, and all the colors of the picture are brought out with marvelous brilliancy, in fact with the same perfection as by daylight. The idea of illuminating art galleries in the evening by the lime light is an excellent one. The yellow color of the ordinary gas flame reveals only a portion of the colors of the paintings. The reds and yellows are seen well enough, but the blues and greens, and their various tints, are sadly distorted, and the artistic effect lost. Lime light obviates such difficulties.”

Levett Ibbetson is credited with pioneering the use of limelight in photography. An oxyhydrogen flame (a mixture of oxygen and hydrogen) heated a piece of quicklime until it became white-hot, creating incandescence.

Sanitary Hospital Walls

“A writer in the London Builder suggests that thick glass might be easily and cheaply cemented to the walls of hospitals. It would be non-absorbent, im­perishable, easily cleaned, readily repaired if damaged by accident, and unlike paper and paint, would always be as good as at first. Glass can be cut or bent to any required shape. If desired, the plates may be colored any cheerful tint. The non-absorbent quality is the most important for hospitals and prisons, and, we should think, is worthy the consideration of architects.”

Covers of issues of Scientific American from 1974, 1924 and 1874

Mark Fischetti has been a senior editor at Scientific American for 17 years and has covered sustainability issues, including climate, weather, environment, energy, food, water, biodiversity, population, and more. He assigns and edits feature articles, commentaries and news by journalists and scientists and also writes in those formats. He edits History, the magazine's department looking at science advances throughout time. He was founding managing editor of two spinoff magazines: Scientific American Mind and Scientific American Earth 3.0. His 2001 freelance article for the magazine, "Drowning New Orleans," predicted the widespread disaster that a storm like Hurricane Katrina would impose on the city. His video What Happens to Your Body after You Die?, has more than 12 million views on YouTube. Fischetti has written freelance articles for the New York Times, Sports Illustrated, Smithsonian, Technology Review, Fast Company, and many others. He co-authored the book Weaving the Web with Tim Berners-Lee, inventor of the World Wide Web, which tells the real story of how the Web was created. He also co-authored The New Killer Diseases with microbiologist Elinor Levy. Fischetti is a former managing editor of IEEE Spectrum Magazine and of Family Business Magazine. He has a physics degree and has twice served as the Attaway Fellow in Civic Culture at Centenary College of Louisiana, which awarded him an honorary doctorate. In 2021 he received the American Geophysical Union's Robert C. Cowen Award for Sustained Achievement in Science Journalism, which celebrates a career of outstanding reporting on the Earth and space sciences. He has appeared on NBC's Meet the Press, CNN, the History Channel, NPR News and many news radio stations. Follow Fischetti on X (formerly Twitter) @markfischetti

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Scientific American Magazine Vol 331 Issue 5This article was originally published with the title “50, 100 & 150 Years” in Scientific American Magazine Vol. 331 No. 5 (), p. 88
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