Subject: Natural history

Book published in 1833 describing the inferior maxillary bones of mastodons. Authored by Isaac Hays, this work discusses fossil vertebrate specimens and their relevance to evolutionary theories. Hays's work includes descriptions of fossil specimens and their relevance to the ongoing debate regarding the theory of evolution. The book also touches upon Hays's contributions to paleontology, his involvement in naming disputes with other scientists, and his collaborations with other individuals like Isaac Lea. Hays's arguments for the validity of Tetracaulodon as a distinct species in relation to Harlan's theory are also explored.

A one-page letter written by Jacob Green, Professor of Chemistry at Jefferson Medical College, to Dr. J.J. Cohen on April 4, 1837. From Philadelphia, Pennsylvania, Green discusses returning fossils to Cohen that were used in a paper presented at the Academy of Natural Sciences in Philadelphia on January 24, 1837. He also mentions sending a copy of his speech later.

This is the first American edition of Samuel Bochart's *Sacred Zoology*, originally published in Latin and later translated into English. The book, published by J. Martin, features outstanding illustrations and explores the natural history of animals mentioned in the Bible. This copy is annotated by Jacob Hart of Lancaster, Pennsylvania, who signed it as the owner.