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.
Home USA Casinos Legal Gambling Age Minimum Age to Gamble in United States of America Below you will find the minimum legal age to gamble in various locations around the U.S., Virgin Islands and Puerto Rico. In the 50 American states, some times you'll see a variance, this usually is due to Indian casinos having different age requirements in their casinos than state regulated casinos.