50 Years Ago

From the August 29, 1931, issue

HUGE GENERATORS YIELD BEAUTY TO PHOTOGRAPHER Throbbing electric generators, the machines that are the heart of the great system supplying light and power to more than 120 millions, are odd and beautiful subjects for the talented photographer. In the picture on the cover, Rittase of Philadelphia has caught the spirit of one of the largest […]

From the August 22, 1931, issue

THE GIRL ON THE COVER Her name is Janet Penserosa. She is about four years old and her home is at the New York Zoological Park. And now she can claim the distinction of being the first female gorilla to survive in Gothams animal center. Not only that, but she is probably the only gorilla […]

From the August 15, 1931, issue

ANOTHER TEMPLE TO THE WIND GOD Near the little Indian village of Prairieville–the Mexican name is Calixtlahuaca–archaeologists have made a rare and unusual discovery. They have found one of those circular temples to the God of the Wind, seen by the soldiers of Cortez, but not one of which was ever afterward found on the […]

From the August 8, 1931 issue

TWO ARISTOCRATIC LADIES EMERGE FROM RETIREMENT There is something about newly-emerged silkworm moths that makes one think of the ladies of Cathay or Cipangu, long ago and far away, clothed in silk spun by ancestors of todays silk worms. In the cover picture of this weeks Science News Letter, Cornelia Clarke has made an admirable […]

From the August 1, 1931, issue

THE TRUTH ABOUT DEATH VALLEY Death Valley is a deep trough between two mountain ranges. It is something over 100 miles long and averages 10 miles wide. Within less than 100 miles of Mt. Whitney, the highest peak in the United States proper, it sinks its lowest depression to 276 feet below sea level. This […]

From the July 25, 1931, issue

98-TON BUTTERFLY VALVE, A SIMPLE DEVICE A good place for a photographer to take a picture, this penstock will be serving an even better purpose when it begins to carry water through the dam to turn the huge turbines of the Ruskin power plant, British Columbia. The flow of water through this 19-foot-diameter intake pipe […]

From the July 18, 1931, issue

AIR VIBRATIONS IN ORGAN PIPES REVEALED BY PATTERN IN SMOKE Making smoke rings in organ pipes, to show up the little cyclones that whirl in them when obstacles are placed in the openings, is the curious mode of research adopted by a London physicist, Prof. E.N. da C. Andrade of University College. These little cyclones, […]

From the July 11, 1931, issue

HOT WAVES BRING NORTHWEST GRASSHOPPER INVASION MENACE Grasshopper outbreaks in Nebraska and South Dakota may be only the advance guards of a much worse and more widespread insect horde to arrive before very long if hot waves continue to sweep the country. So say entomologists of the U.S. Department of Agriculture. The coming of these […]

From the July 4, 1931 issue

MAGNIFYING EYE WOULD SEE STRANGE THINGS If we could only convert our eyes into magnifying glasses at will, we would see a lot of astonishing things that escape us now because they are too small. The little walking gargoyle shown on the cover of Science News Letter, for example. It is a juvenile stage of […]

From the June 27, 1931, issue

LARGER MERCURY VAPOR ELECTRIC GENERATING UNIT BEING BUILT A new and larger turbine electric generator that will use mercury vapor instead of steam and will consume less fuel than corresponding modern steam plants is being constructed in the General Electric Company plant at Schenectady, N.Y. This 20,000-kilowatt turbine will have twice the output of the […]

From the June 20, 1931, issue

HUGE ELETROMAGNET INSTALLED AT LEIDEN A huge electromagnet weighing 14 tons, about two-thirds as much as a street car, just erected at Leiden, Holland, by the Siemens Halske Company of Berlin, will enable scientists to wrench atoms apart as never before. This marks the realization of a dream of the late Dr. H. Kammerlingh Onnes, […]

From the June 13, 1931, issue

TWIN ALBINO ROBINS HATCHED WITH NORMAL BIRD Two albino robins, highly interesting and rather rare oddities in the bird world, have been watched from hatching to early maturity at the home of H.D. Shaw of Grinnell, Iowa, and had their pictures taken by Miss Cornelia Clarke, nature photographer. The nest was built high up on […]