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.
You can really get into a casino/ hotel at any age but you have to be 18 years old on a cruse and 21 to actually gamble. Depends, Some casinos ID you and you have to be 21, and then there are some to where you only have to be 18, but cant gamble. It varies by state.