Patent was granted to Samuel Hopkins of Vermont for a process for making potash and pearl ashes. Potash was important as an ingredient in soap and fertilizer. The patent was granted for a term of 14 years and signed by President George Washington, who had the previous month signed the first U.S. patent statute into law on 10 April 1790. Hopkins did not get Patent with a serial No.1 as thousands of patents were issued before the Patent Office began to number them. Congress had passed the Patent Act on 10 Apr 1790. Two other patents were granted that year - one for a new candle-making process and the other the flour-milling machinery of Oliver Evans. The next year, 1791, Samuel Hopkins also was granted the first Canadian patent.
IRON RAILWAY BRIDGE COLLAPSE
July 31, 1849 - Pennsylvania, USA
Near Mast Hope, Pennsylvania, collapsed as a stock train was crossing. The engineer heard a loud cracking, pulled the throttle wide open, and succeeded in getting the engine across in safety. However, the rest of the train fell into the deep ravine of the Westcolang Creek along with the wrecked bridge. A brakeman and two stockmen lost their lives. The New York and Erie Railroad had that year experimented by building three iron bridges, including the one that failed. In 1850, an article in the Scientific American magazine reported that the company, having lost confidence in iron bridges, would tear down the two remaining and replace them with wooden structures.
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Harvard Medical School
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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.
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about Besides Lung Cancer
Besides lung cancer, tobacco use also increases the risk for cancers of the mouth, lips, nasal cavity (nose) and sinuses, larynx (voice box), pharynx (throat), esophagus (swallowing tube), stomach, pancreas, kidney, bladder, uterus, cervix, colon/rectum, ovary (mucinous), and acute myeloid leukemia.
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Neeraj Publications, is working in the field of education for 30 years and feels proud to serve the Students, Institutes, Universities, Schools & Colleges looking for Quality Educational Books. NEE...
Each book is a work of art, unique and beautiful. They are also a piece of history, worth preserving. What's more, they are available for purchase by the foot as well as the yard. In other words, n...
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Association is a not-for-profit trade organization devoted to meeting the needs of its core members – independently owned bookstores with storefront locations nationwide – through edu...
From humble beginnings in the late 70s to today's leading resource for Christian goods, Christian Book Distributors continues to provide an enormous selection at excellent value, with strong custom...
With nearly 300 locations across the US, Family Christian is America's leading Christian book store. And we're more than just a Christian store - 100% of the profits from Family Christian stores su...
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The AMS, founded in 1888 to further the interests of mathematical research and scholarship, serves the national and international community through its publications, meetings, advocacy and other pr...
Taking advantage of vast warehouses across the United States, we stock over 1 million titles for immediate delivery -- that's more titles than any other online bookseller. With so many titles, it i...
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Friendship poems happen to be just the best medium of expressing eternal friendship to that special friend. You can let all the love and affection you possess flow out, right onto the paper lying in front of you, through a sweet little friendship.
The course of the River Thames as we know it today was created about 10,000 years ago, by melt water from the ice-sheets that covered much of the United Kingdom during the last ice-age...