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.
The 21 minimum age requirement to purchase Lottery tickets changed from 18 years of age in 1998 to coincide with the age requirement for other forms of gaming in the state. Louisiana is one of only a few states that require Lottery ticket purchasers to be at least 21 years of age.