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Look at the movement of individual engineers in the database over time. Each dot represents an individual moving to different places.
Mining technicians were vital in the development of industrial mining and on the diffusion of mining technology.
Universities became a central node in the development of industrial societies in the late 19th and early 20th centuries.
The work of engineers has remained in the shadows of mainstream history. This set of visualizations help us to understand the global extension of engineering work in the late 19th and early 20th-century world.