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.
So is there any place in the United States an 18-year-old can escape the uniform 21-year-old drinking age? For a while, Louisiana was a safe haven for thirsty teens. To comply with the letter of the national drinking age law, the state passed a law that made it illegal to buy alcohol if you were under 21.