Normal vision is 20/20. This means that the test subject sees the same line of letters at 20 feet that a normal person sees at 20 feet. 20/40 vision means that the test subject sees at 20 feet what a normal person sees at 40 feet.
Groucho (Julius Henry Marx) born Oct. 2, 1890, Zeppo (Herbert Marx) born Feb. 25, 1901, Harpo (Adolph Marx) born Nov. 23, 1888, Chico (Leonard Marx) born March 22, 1887 and Gummo (Milton Marx) born 1983. All blood brothers from Samuel Marx and Minnie Schoenberg. Thu Apr 11 15:52:59 CDT 2002.
It was also known as The Dalton Brothers because three of its members were brothers; it should however be noted that not all of the gang members came from the Dalton family, and not all of the Dalton brothers were in the gang. The gang specialized in bank and train robberies. During an attempted bank robbery in Coffeyville, Kansas in 1892, two of the brothers and two other gang members were killed; Emmett survived to be tried and convicted. He was paroled after serving 14 years in prison.