Chad, Niger, Mali, and Mauritania were know as the French Sahel in the early 20th century
the development of industrilization
The Steamboat
The Steamboat
Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
I am pretty sure that it is the early 20th century
Science and theory in the early 20th century?.
William Hoover invented the vacuum cleaner in the early 20th century.
The Steamboat
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Chad, Niger, Mali, and Mauritania were know as the French Sahel in the early 20th century
Chad, Niger, Mali, and Mauritania were know as the French Sahel in the early 20th century
Adolf Hitler.
the development of industrilization
The middle class
The Rochester test was an early self-test for lead poisoning using a chemical reaction between hydrogen sulfide gas and a urine sample which would result in a color change - a black color indicated the presence of lead. It was used in the early 20th century before more sophisticated tests were developed.
Early 20th Century