Rebirth of Lucky Wife

Chapter 173: Making Ice from Saltpeter in the Large Mine in the Northwest

Originally, Ma Ya'er planned to treat the rich people who donated money to dinner after the epidemic was over. This time Wei Hao came and the prefect directly took the lead, which saved her a lot of trouble.

Malya'er planned to show her fiancé the little notebook of "who did it willingly and who did it reluctantly" that she had secretly recorded, and let him reward him as appropriate. Regardless of whether it was reluctant or not, he had given money after all, right?Besides, Wei Zizhan still has to stay in the Northwest for a while. It would be better to know the details of these local snakes earlier. After all, she has to leave too.

In March, the malt will be ready.Chen Qingyun, the Marquis of Wu'an's wife, was her biological mother. She had already sent several letters to Yaya to go home quickly to prepare for the hairpin banquet.

But before leaving, Malyaer wanted to do something for Northwest China.

In ancient times, families who had the conditions would store ice in winter and store it in ice cellars for safekeeping until the next summer.

Due to the impact of the epidemic, the second half of last year was very busy. The family used all the money they could to fight the epidemic, and there was no money left.

Later, the epidemic was almost over, and Mingyue added Juro to the Mai family at the end of November.In the first month of this year, he was listed in the family tree and named Mai Xuance, nicknamed Mu Geer.Ma Ya'er privately felt that this was Uncle Wu finding an opportunity to confess to his wife again.

Therefore, in early May, when the weather was getting hotter, Mai Yaer sent his steward to take a look at the ice cellar at home, only to learn that the Mai family did not store much ice last year.

It was a bitter summer in Malt. She drank the lukewarm sour plum juice and was thinking about how she would spend this summer. ~Iced milk tea, ice cream, torches, northeast big board... After thinking for a day, I slapped myself on the forehead and said, "Yes, this is the northwest!"

There were saltpeter mines in ancient China. There were a large number of saltpeter mines in Hanzhong and they were distributed throughout the country.

Before the discovery of saltpeter ice-making technology, ancient emperors asked slaves to take ice from the center of the lake in winter in order to cool down, store it in cellars, and then take it out and enjoy it in the following summer. Therefore, ice drinks first originated in China.

Around the end of the Tang Dynasty, people mined large amounts of saltpeter for the production of gunpowder. By chance, it was discovered that saltpeter dissolved in water and could instantly absorb a large amount of heat, causing the water temperature to drop to freezing. The technology of making ice with saltpeter came into being.

By the Song Dynasty, there were many kinds of cold food on the market. People chipped the ice into pieces, ground it into smoothies, and added fruits or juices.Merchants in the Yuan Dynasty were still adding fruit pulp and milk to smoothies, which is very similar to modern ice cream.

This is the northwest, where China's saltpeter mines are located.After so many years of investigation, Malyaer discovered that not only was the timeline slightly off, but the geological structures of the Wei Dynasty and later generations were also similar.

Malyaer thought about the several large saltpeter mines that were famous in later generations, and compared them with the northwest map, he had a rough idea of ​​the scale in his mind, which gave him a lot of confidence.

Therefore, in May, Princess Fu'an led a hundred elites to search for minerals in the northwest, non-stop for a month.Because she has to explore everywhere, she often leaves early and comes home late, and occasionally sleeps in the wild for two days.In this way, a girl named Jiao'e was exposed to the wind and sun for a month and became several degrees darker, but she found what she wanted.

After Ma Yaer determined the size of the mine, he immediately wrote a book and asked his second uncle Wei Sheng to send troops to station and protect the saltpeter mine; then, he wrote a booklet to inform his future father-in-law.

"Uncle Huang, Ya'er has found something good. Send someone to collect it from the treasury quickly!"

News of the emergence of large mines in the northwest spread like wildfire. At the same time, Princess Fu'an's method of making ice from saltpeter also spread widely.