What was the key difference between Priestley's 1756 diagram and Playfair's bar chart?

Answer

Priestley’s chart demonstrated duration across time, whereas Playfair’s was intended to compare contemporary quantities.

Priestley’s diagram displayed the relative lengths representing the duration of monarchs' reigns (chronological record), while Playfair's innovation was intended to compare quantities like imports versus exports.

What was the key difference between Priestley's 1756 diagram and Playfair's bar chart?

#Videos

Who Invented Bar Charts: Was It William Playfair? - YouTube

inventionGraphstatistic