Other than sesame oil, there was basically no other vegetable oil used for cooking.
"If this was modern society, I wouldn't even bother to answer you if you asked this question.”
Li Wufeng sighed in his heart at the difference between the past and the present. He smiled and said,"Would I lie to you? Shopkeeper Liu, you don't have to worry about not having enough oil in the future.”
Shopkeeper Liu couldn't close his mouth from laughing. He kept saying,"That's great, Boss. I'm not worried anymore.”
The price of these beans was low, and there were many of them. There was nothing to worry about.
Look at how happy he is, as if it's the new year.
As the wheel turned, the round stone sank deeper and deeper. More and more soybean oil flowed into the wooden barrel, making a dripping sound.
To Shopkeeper Liu, this sound was a beautiful music score. It was the most beautiful sound he had ever heard in his life.
He only loosened the wheels when the oil stopped coming out. There was already more than half a bucket.
This was his first time extracting oil, and he already had so much. Li Wufeng was still very satisfied with his achievements.
Li Wufeng removed the foam on it. When it settled, he put the clarified part into another wooden barrel. The remaining oil could be used to feed the pigs.
"Husband, you have the oil, but it's already June and the weather is hot. I'm afraid there will be fewer customers.”
Liu Siying frowned.
Chang 'an was very stuffy in June.
However, the upper nobles would store ice cubes in the winter to save for the hot summer.
However, at this time, a large portion of the ice would still melt.
Therefore, even if they were nobles, only the family head and important members could enjoy the coolness of the ice.
Although the red-whisked girl was not in Chang 'an, she heard from Li Jing that after Li Wufeng got married, she returned to her sect and went to pray for Li Wufeng.
Li Wufeng couldn't help but feel touched. His mother was indeed different.
Li Jing had also asked the butler of the Public House to send some ice cubes to Li Wufeng.
However, it was not much. Old Li was a noble person and only relied on the salary of the imperial court to survive. Although he also had a lot of land rent, he took great care of his old brothers who were disabled in the past and often took out the money from the family to help them.
Therefore, Duke Wei's Public House was not very generous, even Qin Qiong, this Duke of Hu, was the same.
Xiao Cui said to Li Wufeng,"San Lang, it's not even half of June yet. There's not much ice left in this cellar." I'm afraid we'll have to slowly endure the summer in the days to come.”
"Boss, there's nothing we can do about it!" Shopkeeper Liu said helplessly. Every summer, the restaurants in Chang 'an City would lose a lot of business. It was the same for everyone, so it was not a big deal.”
It's not a big deal?
Li Wufeng almost wanted to kick Shopkeeper Liu out. He was earning a lot of money every day, and even losing 1% would make his heart ache.
However, after hearing Liu Siying's words, Li Wufeng suddenly had a thought.
Making ice might be another big plan to make money.
The thing needed to make ice was naturally saltpeter. It was still the early Tang Dynasty, and no one had discovered the principle of saltpeter making ice.
He could earn money!
The chemical name of saltpeter was calcium nitrate. When it dissolved in water, it would absorb heat and the temperature would drop, so the water would freeze.
The earliest records of saltpeter making ice in history began when people were producing gunpowder at the end of the Tang Dynasty.
After mining saltpeter, people discovered that saltpeter would absorb a large amount of heat when dissolved in water, causing the water to cool down to the point of freezing.
From then on, there was a method of making ice in summer.
Later on, there were merchants who gradually added sugar to the ice to attract customers.
However, it was not until the Song Dynasty that the variety of cold food on the market became more and more numerous.
The shop owners even added fruit or juice, and even added fruit pulp and milk to the ice.
This was very similar to modern ice cream. In other words, it was the ancestor of contemporary ice cream and Haagen-Dazs.
In fact, the diligent and intelligent Han people had a custom of storing ice cubes in the ice cellar in winter and using them in summer as early as the Shang Dynasty.
In the Zhou Dynasty, the government had officials who specialized in this matter, called "Ling Ren", and built "ice wells" with ice cellars.
This was recorded in the Book of Songs, Wei Zhi, and Song Dynasty Hui Yao.
In the northern regions, ice was stored in winter and taken out in the summer of the following year. It was given to the officials by the government, known as "Banning Ice" or "Giving Ice".
This custom was one of the most important things in ancient decrees.
There was also a market for it among the people. Some smart people used a plane to break the ice into ice chips, mixed with white sugar and spices for human consumption. It was a very popular summer food.
Of course, there was still none.
The real realization of artificial ice making began at the end of the Tang Dynasty.
At that time, there were already vendors selling cold drinks and food on the streets of Chang 'an.
During the Southern Song Dynasty, the technology of making ice became increasingly mature. The Han people had already mastered the use of saltpeter in ice water as a cooling agent.
Then, with milk as the raw material, it was stirred while condensing. Then, various fruit juices and fruits of different flavors were added to make a delicious "ice cheese".
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