They are I appreciate the additional source. After some quick googling I’ve seen Philly as “low” as 13 and as high as 2 per Inky so there’s some variability in the methods that I don’t understand. Either way, it seems like many northeast more industrial cities, Philly is highly segregated. Could be our size during the Industrial Revolution attracted many black southerners and entrenched them in certain areas due to red lining. Maybe Boston had a smaller migration of black southerners during this period seeking work in northeast cities