List of chemical symbols. Most chemical elements are represented symbolically by two letters, generally the first two in their name. In some cases, the first letter together with some other letter from their name was used, particularly when their first two letters had already been allocated to another element.
Patterson Township, Beaver County, Pennsylvania. Patterson Township is a township in Beaver County, Pennsylvania, United States. The population was 3,029 at the 2010 census.
This is the site of the 6th Pennsylvania Historical Marker for Upper Darby Township. It is located along the Collenbrook Creek in the Aronomink section of the Township. Dr. George Smith married into the Lewis Family in 1829. He was to become one of the most influential people in the history of Delaware County.