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.
Only three Provinces allow gambling at â¦ age eighteen. 18, or 19, depends on province The legal age for gambling in Ontario is 18. You can buy lottery tickets and play bingo. But if you wish to gamble where alcohol is served you must be 19, as the drinking age in Ontario is 19.1) A person must not employ a child under 15 years of age unless the person has obtained the written consent of the child's parent or guardian. (2) A person must not employ a child under 12 years of age without the director's permission.