The 20th century is a time of ubiquity and decline of mechanical calculating machines. In the first half of the century thousands of companies, primarily in Germany and the USA, manufactured millions ...
Duke University. (2024, December 4). 20th century lead exposure damaged American mental health. ScienceDaily. Retrieved December 24, 2024 from www.sciencedaily.com / releases / 2024 / 12 ...
A fire destroyed the Spring Grove Theater. The evening box office had just opened, and the fire spread from the basement and burned the newly decorated theater. About ten patrons who were in the ...