Subject: Geology

This is an offprint of a monograph by Jacob Green describing two new species of trilobites. The monograph is dated January 24, 1837, and is an offprint of a speech delivered that day at the Academy of Natural Sciences in Philadelphia. This particular copy is inscribed to Dr. J. J. Cohen by the author. Jacob Green was a prominent scientist who held professorships in chemistry and natural history at Princeton and Jefferson Medical College. He was a prolific publisher on trilobites and other scientific topics.

Manuscript draft of an article titled "Connexion of Science and Revelation," later published in Isaac Leeser's *Occident* (5:1) in April 1847. Written by Solomon da Silva Solis, the manuscript explores the perceived conflict and eventual harmony between scientific discoveries and biblical accounts of creation. The draft discusses the evolving interpretations of biblical timelines in light of advancements in geology and astronomy. Includes biographical information about the author.

Three and three-quarters page letter written on Academy of Natural Sciences stationary by Angelo Heilprin to C. B. Norton on March 23, 1884. Heilprin, curator at the Academy of Natural Sciences in Philadelphia, offers observations and advice to Norton concerning a proposed exhibition of American art in London. The letter reflects the state of American art relative to European art during that period.