Art 2 heart dating
The fact that the Pennsylvania forebay barn type did not appear in Holland Township until the first decade of the 19th century suggests that the barn type did not reach upper Bucks County until the first decade of the 19th century.
However, the Federal Direct Tax of 1792, lists a “35’ x 60’ stone barn” in Durham Township, and a “30’ x 50’ stone barn” in the neighboring Township of Nockamixon which suggests the presence of the larger forebay barn type in Upper Bucks County by the end of the 18th century (further research in Bucks County is required).
The Historic Preservation Commission of Holland Township, New Jersey, hired Oxford Tree-Ring Laboratory to date nine barns with dendrochrolology.
These include rafter plates with double notched rafter seats, posts with a flair at one end reused as a plate, as well as whole sections of reused framing.The dendro study revealed that the earliest remaining barns were built entirely of hewn timbers and the rafter plates have double notched rafter seats.The earliest barn to be framed with single notched rafter seats dates to 1794 but there is an overlap; the other 1794 barn has double notched rafter seats.The date of 1806 for the earliest remaining stone Pennsylvania forebay barn supports this conclusion.(Note: Barn historians formerly assigned a circa 1820 to 1825 date for the migration of the Pennsylvania Forebay barn form into Northwest Central New Jersey).