Traces of the Development of Science and Technology(3) In 1868 traffic lights In 1876,telephone In 1877,moving pictures In 1878 lightbulb In 1880,toilet paper In 1884,fountain penTraces of the Development of Science and Technology(3) ❖ In 1868 , traffic lights ❖ In 1876, telephone ❖ In 1877, moving pictures ❖ In 1878 , lightbulb ❖ In 1880 , toilet paper ❖ In 1884, fountain pen