Parents
Children
Siblings
1858
Nov 9
| 1858 • Papers by Darwin and Wallace announcing a theory of evolution by natural selection are read at London's Linnean Society. |
1883
Age: 24y
birth of childFred W Roetzheim Minnesota, USA ⇓ |
| 1883 • Peru and Chile sign the Treaty of Ancón, by which the Tarapacá province is ceded to Chile, ending Peru's involvement in the War of the Pacific. |
1887
Age: 28y
birth of childWilliam Roetzheim Illinois, USA ⇓ |
| 1887 • Heinrich Hertz discovers the photoelectric effect on the production and reception of electromagnetic (EM) waves (radio). This was an important step towards the understanding of the quantum nature of light. |
1920
Jan 12
Age: 61y
residenceChicago, Cook, Illinois, USA ⇓ He was a carpenter. 1 Source ⇓ |
| 1920 • Thousands of onlookers watch as "The Human Fly" George Polley climbs the Woolworth Building in New York City. He reaches the 30th floor before being arrested. |
1927
Feb 8
Age: 68y
| 1927 • A general strike in Shanghai protests the presence of British troops. |