Jathurchan Selvakumar

…oing on in the lab and during his workday, what was going on in both business and lab environments. He was constantly keeping a record.

…doing the development work on the electrical system that was subdivided among teams of researchers. This journal also contained references to different books and the pages where things were being recorded. Later on, Edison tended to have his researchers keep their own notebooks. It was a better way to ke…