And a kittenâs teeth first come in between two to four weeks; their more permanent set appears at around four months of age. So if you open a catâs mouth and find permanent, white teeth, the feline is likely to be around a year old. popular misconception is that cats age seven years (in human years) for each calendar year. In fact, feline aging is much more rapid during the first two years of life.
Sarah Boone (1832-1904) was an African American inventor who on April 26, 1892, obtained United States patent rights for her improvements to the ironing board.
Earl Richardson invented a sole plate (the bottom part of the iron that is made of metal and does the actual pressing) that improved how and where sole plates were heated for better ironing. His iron had more heat in the tip than in the center and was known as the Hotpoint.