Chapter 91: Papermaking Ice-Making Method

ls.Looking at the bubbling cauldron, the fragrant aroma of sizzling pork wafted through the air, stimulating the nerves of everyone present.The meat was not yet tender, but the villagers waiting for d...It is now the middle of the month.

The night was deep, a round moon hung high in the sky.

Inside the Yang family home, everyone sat together, watching Xiao Jiu calculate.Herbs"Though she didn't know what nitric acid was, she had heard of a kind of medicine called nitric acid.However, Yang Lin shook his head and said: "What you said is saltpeter, saltpeter can be used...