1880
| 1880 • Piezoelectricity is discovered by Pierre Curie and Jacques Curie. |
1910
Age: 30y
residenceClarion County, Pennsylvania, USA ⇓ Age in 1910: 30Marital Status: Married; Relation to Head of House: Wife 1 Source ⇓ |
| 1910 • The Japan-Korea Annexation Treaty is signed. It becomes null and void in 1965. |
1920
Age: 40y
residenceRichland, Clarion, Pennsylvania, USA ⇓ Age: 40Marital Status: Married; Relation to Head of House: Wife 1 Source ⇓ |
| 1920 • France prohibits the sale or prescription of contraceptives. |
1930
Age: 50y
residenceBridgewater, Beaver, Pennsylvania, USA ⇓ Age: 50Marital Status: Married; Relation to Head of House: Wife 1 Source ⇓ |
| 1930 • Australian cricketer Donald Bradman scores a world record 309 runs in one day, on his way to the highest individual Test innings of 334, during a Test match against England. |
1935
Age: 55y
| 1935 • Harlem Riot of 1935: A race riot breaks out in Harlem (New York City) after a rumor circulates that a teenage Puerto Rican shoplifter in the S. H. Kress & Co. department store has been brutally beaten. |
1940
Apr 1
Age: 60y
| 1940 • Tom and Jerry make their debut in Puss Gets the Boot. However it is not until 1941 that their current names are adopted. |