Altona: Astronomische Nachrichten, 1851. Quarto. Item #027329
No. 768. Bifolium, English text, pages 381-384. Though he was elected to the Royal Astronomical Society in 1830, his health had slowed his active life but after a remarkable recovery in 1850, here he notes his observations in June and compares them with Dr. Galle's made at Berlin in 1838. His descriptions remain among the finest made in the mid-19th century.