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    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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Travelling in Bolivia with Lipiko Tours the travel agency in Bolivia and tour operator in Bolivia for all your tours in Bolivia but as well for your tours in Peru, Chile and Argentina. As a travel agent in Bolivia Lipiko Tours organises group tours, escorted tours, guided tours and tailor made tours like Kayak Lake Titicaca, scuba diving Lake Titicaca, trek in Bolivia and hikes in the Royal Cordillera, mountaineering courses in the highest mountains in Bolivia, adventure 4x4 tour in Bolivia Uyuni Salt Flats tour the white desert and South Lipez, the Bolivian Amazon tours with Bolivian jungle trek and Pampas tour. Discover the tourism in Bolivia with amazing trips for your holidays in Bolivia.

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