1. On August 9, 1876, New Hampshire native Mary Baker Eddy published the first edition of her book, "Science and Health with Key to the Scriptures," which would go on to become one of the most influential texts in the development of the Christian Science movement.

2. In 1945, the USS Pittsburgh (CA-72) was commissioned at the Portsmouth Naval Shipyard on August 9. The ship served in World War II, and later participated in the Korean and Vietnam Wars before being decommissioned in 1973.

3. On August 9, 1969, the New Hampshire Motor Speedway held its first race, a 300-lap event for modified cars. The speedway has since become a popular destination for motorsports fans, hosting events for NASCAR, IndyCar, and other racing series.

4. In 1974, New Hampshire Governor Meldrim Thomson declared August 9 to be "Old Home Day," a statewide celebration of the state's rural heritage and small-town culture. The tradition continues to this day, with many towns and cities holding their own Old Home Day events each summer.

5. On August 9, 1995, the Mt. Washington Observatory recorded wind speeds of 231 miles per hour, the highest ever recorded on land. The observatory, located on the summit of Mt. Washington, has long been known for its extreme weather conditions and the important data it provides for meteorological research.