Our latest Blog clearly demonstrates the concept of a time scaled bar chart was the invention of Joseph Priestley in 1756 some 150 years before Henry Gantt published his first book in 1913.
The core element of a bar chart is a line of scaled length, where the length equates to its duration in relation to a date scale - the length of the bar represents it duration and the date scale places the bar in time. Priestley, uses this concept first in his Chart of Biography (1756) and then in his A New Chart of History (1769). Later, William Playfair incorporated and enhanced Priestley’s ideas in his ‘Commercial and Political Atlas’ of 1786.
Read the blog at: https://mosaicprojects.wordpress.com/
Or for more on the history of bar charts see: https://mosaicprojects.com.au/PMKI-ZSY-020.php#Barchart
