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.
FIRST U.S. PATENT
July 31, 1790 - USA
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.
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Category Information : Security
This is our Security category. If you are interested in Security, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.
We have spent years looking for the perfect way to make your home and office more secure and comfortable. And with great efforts, 5 product lines with mature technology are unfolding before your ey...
Affordable and editable information security documentation that provides you with professionally written policies and standards that you can buy online.
Our mission is to provide high quality security services to meet our customers’ needs by being committed to maintaining excellence, respect and integrity in all aspects of our operations. To...
A leading supplier of UK manufactured custom made doors each individually designed for the specific requirements of each and every customer. Typically a burglar will gain access to your building vi...
We can quote for any of your security needs, we are one stop shop for security products, we can also Design Systems just email drawings as we have trained AutoCAD Technicians in our office, we will...
COP Alarms are an experienced NSI Approved company in installing burglar Alarms and Home Security Systems for Residential and commercial properties within London and home counties. Our Burglar Alar...
Imagine this scenario. You are sitting in your favorite sit-down restaurant, celebrating a birthday, promotion, or a Spelling Bee victory. A few minutes later, a server appears outside the kitchen, and begins walking towards your table.
Champagne hot air Balloon flights over Berkshire, Hampshire, Hertfordshire, Oxford, Surrey and London. The perfect surprise gift for that special occasion - Birthday Presents, Valentine Surprises, ...
Find the lowest prices on Las Vegas horseback tours at Vegas Horseback Tours. Choose from a wide variety of Las Vegas Horseback Tours including breakfast, lunch, dinner and overnight rides. Book yo...
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.
Unfortunately just like humans our pets will age too. With the aging process comes health problems and with health problems comes very expensive vet bills. Research you dog