Newton, faced in May 1686 with Hooke's claim on the inverse square law, denied that Hooke was to be credited as author of the idea. Among the reasons, Newton recalled that the idea had been discussed with Sir Christopher Wren previous to Hooke's 1679 letter.
Gettysburg is a borough and the county seat of Adams County in the U.S. state of Pennsylvania. The Battle of Gettysburg (1863) and President Abraham Lincoln 's Gettysburg Address are named for this town.
Harrisburg (Pennsylvania German: Harrisbarig) is the capital city of the U.S. state of Pennsylvania and the county seat of Dauphin County. With a population of 49,673, it is the ninth-largest city in the U.S. state of Pennsylvania.It lies on the east bank of the Susquehanna River, 105 miles (169 km) west-northwest of Philadelphia and 204 miles (328 km) east of Pittsburgh.he city is the county seat of Dauphin County. The adjacent counties are Northumberland County to the north; Schuylkill County to the northeast; Lebanon County to the east; Lancaster County to the south; and York County to the southwest; Cumberland County to the west; and Perry County to the northwest.