Vintage Scientific Apparatus DesignsEngravings of antique scientific devices, showcasing early mechanical inventions for experimentation in physics and engineering. Cross-section of Edison's lamp-black (carbon) button telephone transmitter (microphone). Wood engraving c1891. 234 assets in this story1746-289993086145-467724566176-660806211746-1113390616145-447096991746-289825646145-467162166176-660787461746-300015666188-681002691788-217994111746-20654409-1500366145-292722981746-289933821746-289999651899-674169284220-219340756176-670512961746-196790911746-290156611746-300181841746-289991081746-299990736176-670727751746-299993236145-467167056145-448052991746-289826591899-656592196176-660841096145-467105654220-219148426145-48966910 PREVIOUS of 3 NEXT