Which arts and sciences are displayed in this painting?

What does the broken chain at the feet of Lady Liberty indicate?

What distinguishes the black people inside and outside the building?

imageThe Library Company of Philadelphia

[[P08.02 Samuel Jennings/ Liberty Displaying the Arts and Sciences, 1792 (new)—EAH2 only]] [[LP Photo: P08.02 Samuel Jennings/ Liberty Displaying the Arts and Sciences, 1792/hew_94622_P08.02]]