With his love of science and detail, Franklin even worked on a design for the lamps. The globes imported from London, he noticed, did not have a vent on the bottom to allow air in, which meant the smoke collected and darkened the glass. Franklin invented a new model with vents and a chimney, so that the lamp remained clean and bright. He also designed the style of lamp, common today, that had four flat panes of glass rather than one globe, making it easier to repair if broken.
