In 1923, Kelvinator refrigerators had 80 percent of the U.S. market and cost more than a new Ford automobile. The units had a freezing compartment, but it wasn’t until 1929 or 1930 that they added ice trays. So what does this have to do with rubber boots?
Answer: In 1928, an inventor, collecting maple syrup, noticed that ice flaked off his boots. This observation led to the invention and patent of the rubber ice cube tray. The invention of the first flexible stainless steel ice cube tray followed in 1933.
The Greenwood district in Tulsa came to be known as “Black Wall Street”, one of the most commercially successful and affluent majority African-American communities in the United States. Booker T. Washington referred to the Greenwood neighborhood as “Negro Wall Street.”
During the Jim Crow era, African-Americans were not allowed to make purchases or services in predominantly white areas. In particular, Oklahoma was known to have some of the harshest and most unjust Jim Crow laws in the country. Some economists theorize this forced many African-Americans to spend their money where they would feel welcomed, effectively insulating cash flow to within the black community and allowing Greenwood to flourish and prosper.
So the deplorables burned it. In the process, they murdered 300, hospitalized 800, arrested and interned 6,000.