Debates for sessions prior than 1873 can be found under the following titles
A hearing is a meeting or session of a Senate, House, joint, or special committee of Congress used to obtain information and opinions on proposed legislation, an investigation, and more. Hearing publications contain data and testimonies from external experts, researchers, and organizations and can be a valuable resource for researching various issues and topics.
The Serial Set contains the House and Senate Documents and the House and Senate Reports. The reports are usually from congressional committees dealing with proposed legislation and issues under investigation. The documents include all other papers ordered printed by the House or Senate. Documents cover a wide variety of topics and may include reports of executive departments and independent organizations, reports of special investigations made for Congress, and annual reports of non-governmental organizations. During the late nineteenth and early twentieth centuries, executive-branch materials were also published in the Serial Set.