1927 January 7. It's 50 lines at 18 frames per second. 1928 July 12. Bell Labs use sunlight to illuminate a subject for television. 1928 September 11.
Reports are that the color is good.
1929 November 18. This is a major advancement in the development of an all electronic television system as the mechanical receivers and cathode ray tube receivers were of poor quality. 1928 C. Francis Jenkins had developed a system for transmitting film via television. The film moved continuously rather than intermittently. 1930 January 16.