Daniel Harris Johnson 1825–1900 Source: Wikimedia Commons About Daniel Harris Johnson American lawyer and politician People from the Same Era Johannes Rudolf von Wagner 1822–1880 chemical technologist, chemist, technologist, university teacher, writer Leipzig Harris Nelson 1835–1883 politician Prussia Samuel Langley 1834–1906 aerospace engineer, aircraft pilot, astronomer, astrophysicist, inventor, military flight engineer, physicist Roxbury J.A. Schwartz 1820–1874 politician, turner Copenhagen Bernard August Egter van Wissekerke 1833–1891 military officer Maastricht Pavel Poppetrov 1823–1893 merchant, politician Vidrare