Spouse
Children
1866
| 1866 • The Royal Aeronautical Society is formed in London. |
1887
Jan 2
Age: 21y
|
marriageFriederich Wilhelm Roetzheim Chicago, Cook, Illinois, USA ⇓ 1 Source ⇓ |
| 1887 • Results of the Michelson-Morley experiment are published, indicating that the speed of light is independent of motion. |
1887
Jul 4
Age: 21y
birth of childTheodore Roetzheim Chicago, Cook, Illinois, USA ⇓ |
| 1887 • The Reinsurance Treaty is closed between Germany and Russia. |
1889
Feb 14
Age: 23y
birth of childPauline A Roetzheim Chicago, Cook, Illinois, USA ⇓ 1 Source ⇓ |
| 1889 • Columbia Phonograph is formed in Washington, DC. |
1900
Age: 33y
| 1900 • Dr. Henry A. Rowland of Johns Hopkins University announces a theory about the cause of the Earth's magnetism. |
1927
Age: 60y
| 1927 • The Kuomintang (Nationalist Chinese) set up a government in Nanking, China. |