How to treat a rattlesnake bite in the 1800s?

Frontiersmen often believed that putting gunpowder on the wound and setting it alight would burn the venom out. More common ways were to cut out the wound (and hopefully the venom), or to drink copious amounts of whiskey to counteract it, but in reality it only sped up the distribution and absorption of the venom.

Hope this helps!

Good samaritan law protects civilians when they render aid to someone in need. 

Behavioral science is the study of human behaviors and how they can be influenced.  by examining patterns in behavior as well as reactions, individuals with behavioral problems can be more adequately treated, resulting in greater mental health of our society/the public.