Portland Cement
Inscription
This industry was born in the Lehigh Valley. David O. Saylor first made portland cement at Coplay in 1871. Here also was the first use of the rotary kiln process commercially Nov. 8, 1889. This region has continued to lead in the industry.
Location
Sources
More markers in Northampton
Heckewelder House
Bethlehem, PA
One-half block south, stands the home of John Heckewelder, famed Indian missionary and interpreter, author of works on American Indians.
Sun Inn
Bethlehem, PA
Erection begun, 1758; enlarged and altered in 19th century.
Robert H. Sayre
Bethlehem, PA
The engineer and philanthropist lived here.
Northampton County
Easton, PA
Formed March 11, 1752 out of Bucks County.
Moses Tunda Tatamy
Tatamy, PA
A Delaware Indian of the Munsee branch, he exemplified the spirit of reconciliation.