The Pennsylvania-German in the field of the natural sciences

Author: Porter, Thomas Conrad, 1822-1901.
Published 1896

Farewell sermon delivered before the faculty and students of Franklin and Marshall College, in the First German Reformed Church, Lancaster, Pa., on Sunday, July 22d, 1866

Author: Porter, Thomas Conrad, 1822-1901.
Published 1866

Picture of Philadelphia : giving an account of its origin, increase and improvements in arts, sciences, manufactures, commerce and revenue : with a compendious view of its societie...

Author: Mease, James, 1771-1846.
Published 1831

Addresses delivered at a celebration in honor of Prof. Thos. Conrad Porter, D. D., LL. D., at Lafayette college, October 20, 1897

Published 1898

Addresses delivered at a celebration in honor of Prof. Thos. Conrad Porter, D.D., LL.D., at Lafayette college, October 20, 1897

Published 1898