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John Caspar Wister was an American horticulturalist known as the Dean of American Horticulture. He founded and served as the first director of the American Iris Society from 1920 to 1934, as director emeritus of the Arthur Hoyt Scott Horticultural Foundation and the John J. Tyler Arboretum, as well as secretary of the American Rose Society and the Pennsylvania Horticultural Society for 24 years. He authored or edited dozens of books and over 500 articles on horticulture. He is one of the most highly honored horticulturist in the United States and the first recipient of the four major horticultural awards: the Liberty Hyde Bailey Medal, the Scott Garden and Horticultural Award, the A.P. Saunders Memorial Medal, and the Honor and Achievement Award of the American Lilac Society.

Antonius Johannes Petrus Poels is a retired Dutch professional cyclist.

The Great Train Wreck of 1856 occurred in Whitemarsh Township, Pennsylvania, between Camp Hill station and Fort Washington station, on July 17, 1856. Two trains, traveling on the same track in converging directions, collided, killing between 59 and 67, and injuring over 100. The incident was referred to as The Camp Hill Disaster in Montgomery County, and The Picnic Train Tragedy in Philadelphia. It was the deadliest railroad catastrophe in the world up to that time and became one of the signature events of its era.