For its annual theme in 2009, the Pennsylvania Historical and Museum Commission (PHMC) is focusing on energy and the effect it has had on the Commonwealth with Energy: Innovation and Impact
. Read "Exploring the Pennsylvania Energy Trail of History
" (PDF, 2.4 MB) compiled by Michael A. Bertheaud and Howard M. Pollman from the Summer 2009 edition of Pennsylvania Heritage
to learn more about the sites and museums on the trail. See for yourself how energy fueled Pennsylvania and the developing nation by exploring PHMC historic sites and museums along the Energy Trail of History.