section_path: Other inventions and projects/Tasimeter
section_name: Tasimeter
paragraph_text: Tasimeter
  
  Edison invented a highly sensitive device, that he named the tasimeter, which measured infrared radiation. His impetus for its creation was the desire to measure the heat from the solar corona during the total Solar eclipse of July 29, 1878. The device was not patented since Edison could find no practical mass-market application for it.