By following what the book said, I tried making a sulfur farm, but when plancing the acid radrock and acid with the dripstone on the bottom of the block, the acid did not drip from the dripstone, at least visualy.

Acid radrock drips on its own, no dripstone required. It will take a while for sulfur crystals to grow though, it's a slow process.

thank you I will see if that works

It worked thank you