The increase in life expectancy during the 20th century is largely due to improvements in child survival; this increase is associated with reductions in infectious disease mortality, due largely to immunization.1 However, infectious diseases remain a major cause of illness, disability, and death.
The First Mowers. The lawn mower was invented in 1830 by Edwin Beard Budding, an engineer from Stroud, Gloucestershire, England. He obtained the idea after seeing a machine in a local cloth mill which used a cutting cylinder (or bladed reel) mounted on a bench to trim cloth to make a smooth finish after weaving.
Date: Tue, 1834-10-14. This date in 1834 marks one of the first patents filed by a Black person in America. Henry Blair of Montgomery County, MD, received his first patent on October 14, 1834, for his invention of the corn seed planter, which allowed farmers to plant their corn much faster and with much less labor. The machine also helped with weed control.