Adams was inaugurated on March 4, 1825. He took the oath of office on a book of constitutional law, instead of the more traditional Bible. In his inaugural address, adopted a post-partisan tone, promising that he would avoid party-building and politically-motivated appointments. He also proposed an elaborate program of "internal improvements": roads, ports, and canals. Though some worried about the constitutionality of such federal projects, Adams argued that the General Welfare Clause provided for broad constitutional authority. While his predecessors had engaged in projects like the building of the National Road, Adams promised that he would ask Congress to authorize many more such projects.
Sources contend that in 1843 Adams sat for the earliest confirmed photograph still in existence of a U.S. president, although others maintain that William Henry Harrison had posed even earlier for his portrait, in 1841. The original daguerreotype is in the collection of the National Portrait Gallery of the Smithsonian Institution.
Though he later described his presidency as the unhappiest time of his life, scholars rate John Quincy Adams in the second quartile in the majority of historical presidential rankings. Historians have often included Adams among the leading conservatives of his day. Russell Kirk, however, sees Adams as a flawed conservative who was imprudent in opposing slavery. Adams' foreign policy legacy, and its focus on noninterventionism, led to his name being adopted by the John Quincy Adams Society, a network of student groups that is "committed to identifying, educating, and equipping the next generation of scholars and policy leaders to encourage a new era of realism and restraint in American foreign policy."
John Quincy Adams Birthplace is now part of Adams National Historical Park and open to the public. Adams House, one of twelve undergraduate residential Houses at Harvard University, is named in honor of John Adams, John Quincy Adams, and other members of the Adams family who were associated with Harvard. The name Quincy has been used by several locations in the United States, including the town of Quincy, Illinois. Adams County, Illinois and Adams County, Indiana are also named after Adams.
He was the first president to adopt a short haircut instead of long hair tied in a queue and to regularly wear long trousers instead of knee breeches.
During the Jurassic period, the primary vertebrates living in the sea were fish and marine reptiles. The latter include ichthyosaurs, which were at the peak of their diversity, plesiosaurs, pliosaurs, and marine crocodiles of the families Teleosauridae and Metriorhynchidae. Numerous turtles could be found in lakes and rivers.
In the invertebrate world, several new groups appeared, including rudists (a reef-forming variety of bivalves) and belemnites. Calcareous sabellids (Glomerula) appeared in the Early Jurassic. The Jurassic also had diverse encrusting and boring (sclerobiont) communities, and it saw a significant rise in the bioerosion of carbonate shells and hardgrounds. Especially common is the ichnogenus (trace fossil) Gastrochaenolites.
During the Jurassic period, about four or five of the twelve clades of planktonic organisms that exist in the fossil record either experienced a massive evolutionary radiation or appeared for the first time.