These were the âBlue Bladeâ type that had a blue oxide finish, and that finish, in contact with an ordinary pencil âleadâ, made a point-contact rectifier. This served the purpose of the âcrystalâ and âcats whiskerâ of early crystal radios; it permitted current coming in from the antenna to flow in only one direction.
Age restrictions: To participate in the state lottery or horse track betting you must be 18 years old. To gamble in a casino or on a video poker machine, you must be 21. Casinos and Racetracks: Riverboat casinos are legal in Louisiana.
1 be 17 years old (16 years old at the Louisiana Office of Motor Vehicles), but must be 18 years old to vote; 2  not be under an order of imprisonment for conviction of a felony; 3  not be under a judgment of full interdiction for mental incompetence or partial interdiction with suspension of voting rights; and. be a U.S. citizen; 2  be 17 years old (16 years old at the Louisiana Office of Motor Vehicles), but must be 18 years old to vote;