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.
Legal gambling age in Alabama depending of the activity you are going to take part. Thus, for land-based casinos, poker rooms, online casinos, online sports betting and onlinâ¦e poker it is 21, for Bingo, Online Bingo, Greyhound and Horse racing it is 18. For lottery the age is not specified, since no lottery is available in Alabama.