Allows you to search across more than thirty databases providing access to primary sources from and/or relating to America, Britain, and countries around the globe. The majority of the documents date from a timespan that begins with the fifteenth and extends through the early 21st century. Databases here that are of high relevance to America include: Sabin Americana: History of the Americas, 1500-1926; Indigenous Peoples of North America; American Historical Periodicals from the American Antiquarian Society; Nineteenth Century U.S. Newspapers; Archives Unbound; and Public Health Archives: Public Health in Modern America, 1890-1970.
Searching across many databases at once, as the master platforms listed in the box above enable you to do, can be useful for many research purposes. On the other hand, each of the databases accessible through the master platforms above also has its own distinctive interface and landing page. The landing page and interface of an individual database will provide you with many orientational cues that you will not be seeing when you search across many databases at once through a single plain master platform.
In the links below I provide access to some standalone databases, but also to some databases that are also accessible through master platforms in the box above. When I have singled out databases below that are also accessible through master platforms, it is because I believe that the database itself is especially important--along with the original interface that was designed specifically for it.