Mary Katherine Kuechler
Spouse
Children
Theodore Roetzheim
Theodore Roetzheim
1887 - 1924
Pauline A Roetzheim
Pauline A Roetzheim
1889 - 1964

1866

1866 • The kingdoms of Italy and Prussia form an alliance against the Austrian Empire.

1887


Jan 2
Age: 21y
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.

1887


Jul 4
Age: 21y

1927


Age: 61y
1927 • The Communist Chinese People's Liberation Army is formed during the Nanchang Uprising.

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