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TODAY IN HISTORY
RECORD “SINGLES”
January 10, 1949 - 7-inch diameter 45 rpm, U.S.A.
January 10, 1949 - 7-inch diameter 45 rpm, U.S.A.
RCA introduced the “single,” the 7-inch diameter 45 RPM record in the U.S.A single could play eight minutes of sound per side. Columbia had introduced the 12" long-playing vinyl 33 RPM as a new format the previous year. These formats greatly improved upon the 78 RPM records, which were limited to only 5 minutes per side on a 12" disk. Vinyl records were less fragile, and had a lower level of surface noise, but needed new playing equipment. RCA subsequently manufactured a record-player with a wide-diameter spindle to automatically play a stack of singles. The 45 RPM, 7" record was favored by the young, and became successful with the onset of rock and roll. In the UK sales of 45s overtook 78s early in 1958.
BLACK AMERICAN INVENTION
January 10, 1888 - U.S.A.
January 10, 1888 - U.S.A.
A U.S. patent was issued for the railway signal to the Black American inventor, A.B. Blackburn (No. 376,362). The type of signal was that designed to be operated by the wheels of a train. A lever was depressed as a train wheel travelled over it, to remotely operate an alert through a mechanical linkage upon the passing of the train. It was designed for use upon a single track railway line for trains passing in one direction. To provide a signal for trains passing in the opposite direction, a similar apparatus would be applied on the opposite rail. This patent was an improvement in mechanical design of his earlier patent No. 309,517 on 23 Dec 1884, in which he also described how a gong was activated to provide the alert.
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RANDOM QUOTES
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The wealth of the nation
by Earth Day, Gaylord Nelson
"...The wealth of the nation is its air, water, soil, forests, minerals, rivers, lakes, oceans, scenic beauty, wildlife habitats and biodiversity that'as all there is. That'as the whole economy. That'as where all the economic activity and jobs come from. These biological systems are the sustaining wealth of the world...."
by Earth Day, Kenya
"...All of us have a God in us, and that God is the spirit that unites all life, everything that is on this planet. It must be this voice that is telling me to do something, and I am sure it'as the same voice that is speaking to everybody on this planet at least everybody who seems to be concerned about the fate of the world, the fate of this planet. Wangari Maathai-Noble Peace prize winner, Deputy Minister of Environment, founder Green Belt movement in Kenya...."
RANDOM FACTS
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Harvard Medical School
about Eyesight Myth and Fact
Myth: Staring at a computer screen all day is harmful to the eyes. Fact: Spending the day staring at a screen can tire or strain your eyes, but it will not hurt them. Make sure lighting doesn't create a glare on your screen. When spending long periods at your keyboard, take a break now and then to rest your eyes to reduce fatigue. Also, don't forget to blink. Your eyes need to stay lubricated to feel comfortable.
about Facts about Drugs
Facts about drugs can protect against drug abuse. Legal drugs, such as alcohol and tobacco, kill more people than illegal drugs. Tobacco (smoking cigarettes) kills more people than any other drug. Illegal drugs including heroin, cannabis, ecstasy and amphetamines can have unknown or dangerous ingredients. Mixing drugs, especially with alcohol, can be fatal.
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