1. In 1778, the town of Dunbarton officially separated from the town of Bow and was granted incorporation status by the state of New Hampshire. Dunbarton was named after a town in Scotland.

2. On March 19, 1813, the New Hampshire State Legislature approved the construction of what is now known as the Piscataqua River Bridge. The bridge connects Portsmouth, New Hampshire to Kittery, Maine and is the second oldest bridge of its kind in the United States.

3. The New Hampshire State House, located in Concord, was completed on March 19, 1819. The building, which still serves as the state's capitol, features a beautiful dome and many historical artifacts and portraits.

4. In 1923, the Mount Washington Observatory recorded the highest wind gust ever recorded on earth: a staggering 231 miles per hour. Mount Washington, located in the White Mountains of New Hampshire, is known for its extreme weather conditions and has been the site of many scientific studies.

5. On March 19, 1930, the "Shackleton-Rowett Expedition" set sail from Plymouth, England on a mission to explore the Antarctic. Among the crew was an American geologist named Lawrence Gould, who would later become the President of Carleton College in Minnesota. The expedition faced many challenges, including harsh weather conditions and a shortage of supplies, but ultimately made many important scientific discoveries.