The question of road superintendence received early attention from the government of the restoration.
In 1822 he became director of the Seeberg observatory, and in 1825 was promoted to a corresponding position at Berlin, where a new observatory, built under his superintendence, was inaugurated in 1835.
The Cyclopaedia of Biblical Literature, edited under his superintendence, appeared in two volumes in1843-1845and passed through three editions.
During the period of the Jesuit ascendancy in the reign of K'ang-hi (1661-1721), the superintendence of this institution was confided to Roman Catholic missionaries, under whose guidance the bronze instruments formerly existing were constructed.
About 95% of the guns employed in the Spanish-American War were made under his superintendence.