Three decades after it was published, the Second Geological Survey of Pennsylvania was described as "the most remarkable series of reports ever issued by any survey." Considering the diversity of other geological reports, this was no small compliment. Drawing on support from the Marion and Kenneth Pollock Libraries Program Fund, the Pennsylvania State University Libraries' Digital Preservation...

Maps of the Keystone State are in abundance here, and there are some rare surprises among this bunch. The site was created by the Pennsylvania State University Libraries and it contains five separate areas for cartographers, historians, and others who love spatial relationships. First up is the 1861 Digital Atlas of Centre County. Centre County is home to State College, PA and the interface here...