Scope and Contents Philadelphia businessman and president of the Tacomy Chemical Works, he joined the Academy of Natural Sciences in 1847. In 1867, when the trustees of the building fund were making a concerted effort to get money for the new building, Charles Lennig donated to the Academy some chrome ore lands in Chester County. These were sold, but a royalty clause retained some income for the Academy besides the principle gift. These papers have one letter from Lennig advising the sale of the property to...

Overview Joseph Mellick Leidy (1823-1891), one of the great American scientists of the 19th century, possessed a vast knowledge of the natural world. Best known as the Father of American vertebrate paleontology, he also pioneered the fields of parasitology and protozoology, and was the preeminent anatomist of his time. He was also an influential teacher of natural history and an expert in areas as diverse as entomology, geology and pathology. The Joseph Leidy Correspondence collection contains...