The Rare Book and Manuscript Library at Columbia University recently acquired two astronomical texts by Caroline Lucretia Herschel and Carlos de Sigüenza y Góngora.
Herschel's Catalogue of Stars (1798) includes her personal annotations. Carlos de Sigüenza y Góngora's Libra Astronomica, y Philosophica (1690) discusses the Great Comet of 1680-81.
Read more about the acquisitions at the Consortium for History of Science, Technology and Medicine.
