This is clipart converted and broken apart that has been released into the public domain because the document says so, and its from NASA, a USA government agency. The publication is called "The Brain in Space:"
http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/The.Brain.in.Space.html
A HAND-BOOK FOR THE STRANGER IN PHILADELPHIA. CONTAINING DESCRIPTIONS OF ALL THE OBJECTS OF INTEREST IN
"the City and its environs"
WITH VIEWS OF THE PUBLIC BUILDINGS,
BY A PHILADELPHIAN.
AUTHOR OF " THE AMERICAN GUIDE BOOK," ETC., ETC.
Philadelphia:
GEORGE S. APPLETON,
164 Chestnut Street.
1849.