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.
Best Answer: you have to be 21 to gamble anyplace. By Nevada state law, you must be at least 21 years old. Forget the States, go to Quebec, it's 18, it's also 18 in Alberta and Manitoba, everywhere else it's 19, still better than the States, and our Casinos are cleaner too. 21. Source(s): Resident since 1983.