The first Sears retail store opened in Chicago.
Source
The first Playboy Club opened in Chicago.
The sweeping machine (vacuum cleaner) was patented in Chicago, US, by Ives W. McGaffey.
An F5 max rating tornado smashed through Plainfield, Illinois, killing 29 people, injuring 353, and causing $165 million in damages.
Illinois became the first US state to make it compulsory by law to wear a seatbelt.
Great Chicago Fire begins.
