He suddenly thought of something else: if he could cast bronze, then he could produce hinges here, simplifying the structure of cabinet doors significantly.
What to do without tin now?
He felt that the place where copper was discovered might contain tin, although he was worried about the quantity.
There might be difficulties in mining there; poisonous substances could easily cause accidents upon skin contact, and he hadn't figured out exactly how to mine yet.
What should he do with the copper he has?
First, he needs to make bullet heads.
Then make copper handles.
Next, make copper mirrors.
Afterwards, his Punk No. 2 steam engine needs a soft metal plate, so production can continue now.
Then find ways to cast copper coins.
But copper coins alone are not enough; valuables are worth thousands of copper coins and are inconvenient to carry, so silver coins and gold coins are also needed.
However, he hadn't found any silver or gold mines, which made him somewhat anxious.
