I’ve also heard it proposed that a time traveler start a business “boiling the bad spirits out of your water.”
The pitch goes: “You’ve got bad spirits in your water! But for a fee, I’ll boil them right out! Use my special de-spirited water for drinking if you don’t want to get sick, or for washing wounds or surgical tools to avoid infection!”
Requires little to no knowledge, operates within the vocabulary of pre-germ-theory world, and would actually work, thereby promoting your business model.
I’ve also heard it proposed that a time traveler start a business “boiling the bad spirits out of your water.”
The pitch goes: “You’ve got bad spirits in your water! But for a fee, I’ll boil them right out! Use my special de-spirited water for drinking if you don’t want to get sick, or for washing wounds or surgical tools to avoid infection!”
Requires little to no knowledge, operates within the vocabulary of pre-germ-theory world, and would actually work, thereby promoting your business model.