The results of his observations of nebulae are contained in two catalogues published in the Astronomische Beobachtungen der Grossherzoglichen Sternwarte zu Mannheim, 1st and 2nd parts (1862 and 1875), and those of his variable star observations appeared in the Jahresberichte des Mannheimer Vereins fur Naturkunde, Nos.
Kaiser (Annalen der Sternwarte in Leiden, iii.
13, is described in detail by Struve (Beschreibung des auf der Sternwarte zu Dorpat befindlichen grossen Refractors von RIH? ?
He issued 21 volumes of Astronomische Beobachtungen auf der Sternwarte zu Konigsberg (1815-1844), and a list of his writings drawn up by A.