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.
In some cases, one will allow gamblers to begin at a younger age than the other. In the event that these ages differ from one another, you have to go with the gambling age that is higher. For instance - your casino allows 18 year olds, but your state requires you to be 21. That means you cannot join unless you are 21, as per your state's regulations.