a German-American photographer and pioneer of stereoscopic photography. With his brother, he made the first set of panoramic pictures of Niagara Falls and a sequential set of pictures of the first American total solar eclipse ever photographed. Langenheim invented a technique in 1846 for coloring daguerreotype plates and was issued a patent for it. With his brother in 1849 Langenheim used a photography technique invented by Abel Niépce de Saint-Victor which produced negative lantern glass slides. They renamed it "hyalotype" photography and patented it in 1850.
