|The residence would also serve as the site of the Oakridge Select Academy which served first as a boarding school for boys and later as a school for girls. Haupt's intitial efforts at the academy began to draw talented students away from Pennsylvania College (now Gettysburg College). As a result, the trustees of Pennsylvania College in 1845 voted to absorb Haupt, his faculty, and his students. Haupt was offered a half-time professorship as head of the mathematics department. At this point, Haupt converted the academy into a day school for girls, the Female Seminary of Gettysburg. It was during his time here that Herman Haupt became seriously interested in railroad bridge design. Haupt's book, General Theory of Bridge Construction was published in 1851 and met with huge success.