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.
As a general rule, the minimum legal age for gambling in the UK is 18 years old. This applies to adult gaming centres, betting shops, bingo halls, casinos, racetracks and online gambling. The exceptions to this are the National Lottery, lotteries and football pools â youâre allowed to take part in these from the age of 16 as well as some non-commercial gambling, or low stakes and prizes gambling.