Echoes Explained Through History and Science
The article traces the ancient Greek myth of Echo and Narcissus and contrasts it with modern acoustics. It explains how sound echoes arise, notes how air temperature affects speed, gives numerical examples, and offers practical tips to reduce echoes in halls by using soft materials and draped walls.
MENTIONED IN THIS ARTICLE
Greece
Echo
Narcissus
Narcassus
Electric light bugs draw huge citybound swarms
The electric light bug, a large aquatic insect, normally dwells in ditches and lagoons but in early summer migrates to cities in vast crowds. They glide toward lights, descend on streets, and are crushed by automobiles leaving slipper patches on asphalt.
Assassin bugs stalk and kill bees in gardens
The article explains how assassin bugs ambush nectar seekers, wrapping their front legs around the bee and using a sharp beak to suck its fluids. It notes 100 North American species, including the kissing bug and others that bite humans or rodents, with the masked bedbug praised for eating bedbugs. A Palomar telescope can detect a candle’s light from 40,000 miles away.
MENTIONED IN THIS ARTICLE
Brother Bee
North America
Edward S. Hathaway
Tulane University
Palomar
San Diego
California
Evolution of US measurement units through history
The article traces how US units such as inch foot yard and rod arose from ancient and varied standards. It notes ranks from forearms cubits and spans to the Royal Egyptian and Olympic cubits, the spread of the foot to Britain Rome and America, royal yard standards, and key developments like Whitworths measuring machine and the first vernier caliper.
MENTIONED IN THIS ARTICLE
United States
Bilasew
Rome
Britain
Winchester
Westminster
Office of Weights and Measures
Congress
Edward II
Henry I
Joseph Whitworth
Joseph R. Brown
France
Brown and
Sharpe
Rogers-Bond
Eskilstuna
Sweden
Sundew Plant Traps Insects With Sticky Leaves
The sundew plant grows on wet soil worldwide and forms rosettes rarely more than two inches across. Its paddle shaped leaves have fringe fingers that secrete a sticky substance. Once an insect is snagged, nearby fingers bend in to trap the prey.
People Live Below Sea Level in California's Imperial Valley
Sixty thousand residents are said to live below sea level in the Imperial Valley of California. The report highlights geographic and living conditions in the arid region near the Mexican border.
MENTIONED IN THIS ARTICLE
California
Imperial Valley
Swine O. I. C. Hogs Promote Faster Growth
Clyde Texas ad copy promotes swine from Shanks Ho Farm stressing clean, healthy hogs with fast growth. It lists prices 85 dollars and 20 dollars for prime stock and advertises efficient breeding for profit.
MENTIONED IN THIS ARTICLE
O.I.C
Shanks HO Farm
Clyde
Texas
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