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.
1. Betting Age Varies by State. If you've traveled to the Bluegrass State to bet on your favorite steed, you may want to check the betting age. In Kentucky, the gambling age for betting on horse races is 18 -- but in many other states, the minimum age is 21. In states like Texas, children under a certain age may not even be allowed to visit the race track, much less bet on horses.