Addenda to the Aedes Hartwellianae is a book written by William Henry Smyth and published in 1864. The book is an addendum to the original work, Aedes Hartwellianae, which was published in 1850. Aedes Hartwellianae is a catalogue of the Hartwell Observatory's collection of astronomical instruments, and Addenda to the Aedes Hartwellianae provides additional information and updates to the original catalogue. The book includes descriptions of new instruments,...