Science and Medicine of the Victorian Era By ElleryK Jan 1, 1832 Stereoscope Discovered and Patented A device for viewing a stereoscopic pair of separate images, separating left-eye and right-eye views of the same scene, as a single three-dimensional image. Jan 1, 1838 All Plants are Made of Cells Jan 1, 1842 Doppler Effect Jan 1, 1843 Discovery of Law of Conservation of Energy Jan 1, 1846 Discovery of Anesthesia Jan 1, 1846 Discovery of Neptune Jan 1, 1848 Discovery of Absolute Zero Jan 1, 1859 Theory of Evolution by Natural Selection Jan 1, 1861 Germ Theory Jan 1, 1865 Mendel's Law of Inheritence Jan 1, 1869 Periodic Table Jan 1, 1895 Discovery of X-Rays Jan 1, 1896 Discovery of Radioactivity Jan 1, 1897 Discovery of Electrons Jan 1, 1898 Proposal of The Rasin Bread Atomic Model