It is already afternoon to leave Qianfang, riding a horse and walking on the street, the hustle and bustle is endless, the pavilions along the way are magnificent, the crowds are endless, and the color of prosperity and prosperity is endless.

Seeing this grand occasion, Jiang Jie couldn't help but sigh:

"Master Hou, the east of the city thirteen years ago was less than half of what it is today."

"Well, there are more merchants, and the feudal lords and feudal marquis from all over the country can get greater business opportunities in Chenling, and they have also moved their business to Chenling, and even the land price in the west of the city has grown a lot, and in a few years, it is estimated that the camp in the south of the city will also be moved. At that time, Shanling will be the richest city in the Central Plains, unparalleled. ”

While the two were talking, a group of white-haired men walked up not far away, and looked closely at Figos and several Jinxuedi people walking on the street to buy supplies. Handing over Feiyu to Jiang Jie, Bailiyan stepped forward:

"Figos, don't come unharmed."

"Hou Ye also has time to go shopping, it's really rare." Figos was very proud, and did not have the posture that he should have as a "prisoner".

"Is Gudapa-sama alright?"

"Father-in-law, everything is fine, but it is hot and uncomfortable in the summer. By the way, I was just about to talk to Hou Ye about something, but I don't know if it works. ”

"What's the matter?"

"My father-in-law said that he was idle and panicked, and he wanted to do some business."

Hearing that Gudapa was going to do business, Bai Liyan suddenly became vigilant, and he asked carefully:

"What kind of business?"

"The aristocracy used to pick ice in the winter, and then in the summer with milk and butter, beat it into a paste and eat it with ice, we called custard. You can make ice cubes in the first place, so you can do it in the summer. ”

Hearing this, Bai Liyan immediately understood that the business that Gudapa wanted to do was ice cream.

"It's a good business, and it's sure to be a big hit. Just do it, but don't forget to register with the Tax Department. Besides, milk is very perishable in the North Sea, so don't leave it for too long, it will spoil your stomach. ”

"Thank you, Master Hou."

"You're welcome."

The food and clothing of the five or six thousand people in Gudappa and his entourage were all borne by the state treasury, and there has been no income, so doing some business is a measure to reduce the burden on the state treasury.

broke up with Figos, Bai Liyan went to the west of the city, but found that Gu Chen, the manager of Xihuan, was sneaking around in the west of the city.

"Jiang Jie, has there been any change in the Prince's Mansion recently?"

"I haven't heard of it, does Master Hou suspect that Gu Chen has misdeeds?"

"It's not, it's just that the secret agents of the Jin Kingdom are really rampant, Yongxing City is getting bigger and bigger, and the secret agents of the Jin Kingdom are pervasive, and Yongxing City is a little powerless to deal with it. Gu Chen is the secret agent of Xihuan's side, he goes to the west of the city to activities, there must be a Jin businessman in the west of the city, and there must be nothing good. ”

"Then, why don't you send someone to keep an eye on Gu Chen?" Jiang Jie proposed.

"No, I'll send a letter to Su Fangyi in a few days, and ask Yuke to send a group of spies to keep an eye on Lingling and Yongxing, which is more convenient than ourselves."

The Jin State never stopped spying on Yongxing City, and because of the status of the Xihuan Crown Princess, the Xian State maintained the greatest patience and restraint in its espionage activities, but it did not exchange for the acquaintance of the Jin people, but became more and more rampant.

When I returned to the house in the evening, a carriage and more than 20 horses were parked outside the house, and the car was driven by Cheng Jiyuan, the master of the left door.

When he saw Cheng Jiyuan, Jiang Rong was entertaining a group of masters of the Gong School in the inner hall of the atrium, and when he saw Bailiyan appear, Cheng Jiyuan stood up and gave a slight salute and said:

"The old man came uninvited and bothered the Hou Ye."

"Master Cheng's words are serious, and the younger generations are asking for it. I don't know if the master is here, but there are also children and families of the workers who want to move to Yongxing? ”

"Oh, it's not, Lord Hou, please take a look."

Cheng Jiyuan asked people to open a small wooden box, and Baili Yan's eyes lit up immediately.

"The master has made it!"

"Hehaha...... But it took a lot of effort, Hou Ye, please take a look. ”

After taking the wooden box, Bailiyan carefully looked at the measuring tools in the box, and was overjoyed.

"Master Cheng, how is the caliper accuracy?"

"Five silks."

"I wonder if it can be mass-produced?"

"At the moment, we can't imitate it in large quantities, but if we can build a machine, we may be able to imitate it in large quantities. However, this thing is extremely exquisite, if it is made less, the cost is expensive, and if it is made more, it will not be used. ”

"Well, it will be useful in the future. In addition, can there be any progress on the springs, bearings and gears mentioned to the master two months ago? ”

"Oh, the spring is simple, but the gear, my Ligong faction has already made it before, called the teeth, all of them are wooden, but they are not as delicate as the Hou Ye's design, and the copper and iron gears are also quite time-consuming and laborious. As for the bearing, it was made, but it was always unsatisfactory, and the iron balls occasionally fell, and the rotation time was long, and the iron balls wore out very quickly, and they still needed to be improved. ”

At the beginning of last year, Bailiyan took out 500 inches of silver to buy the existing standard measuring tools from the Ligong faction, including a complete set of 12 measuring blocks, a set of standard inches, rulers, and zhang rails of the Ligong faction, a set of three types of angle rulers, a set of Zhong, stone, bucket, sheng, and Hu, and a set of catty, two, and money weights.

According to Cheng Jiyuan, the measuring tool standard can achieve two-wire accuracy. Bailiyan roughly measured it afterwards, and the dimensional tolerance was roughly around two wires, but the shape and position tolerance exceeded five wires.

The current "trace" is one hundredth of a millimeter of the non-earth metric unit, and Bailiyan has calculated that the current trace is about 0.9 centimeters of the earth's metric unit, which is 0.9 humi.

At present, one millimeter is equivalent to about 0.9 millimeters of the earth's metric system, which may be less. The tolerance of the two wires is about 1.8 meters.

At present, the standard has a dimensional tolerance of two wires, which is already quite accurate.

It's inconceivable to think about how the Earth's metric units were converted to their current size, but it's actually quite easy.

There are many parts of the human body that can be used as a reference to measure distance, and the hands and feet are commonly used to measure the distance, but only the diameter of the hair and the interpupillary distance of the eyes are relatively fixed.

The diameter of the hair is between six and eight strands, six strands for fine hair, about seven or eight strands for medium thickness, and nine strands for thick hair.

The normal interpupillary distance for adult yellow men is between 58 and 64 mm, mostly between 60 and 62 mm, and between 57 and 62 mm for adult yellow women, and most between 58 and 60 mm.

Considering the differences in development and region brought about by malnutrition, and in view of the high height of the current Central Plains people, Bailiyan selected the children of the nobility as the basis for measurement and selection, because their nutrition is better and their development is better.

By measuring the interpupillary distance of adult young men and women, the dimensions are obtained, and the male and female data with the largest data are selected from each group.

The data of the two groups selected for men and women are theoretically between 60 and 62 mm for males and 58 to 60 mm for women.

The two groups of male and female data are weighted by the minimum value of males, weighted by the maximum value, weighted by the minimum value of females, and weighted by the maximum value, and finally a difference is obtained, which is theoretically 62 mm minus 60 mm, 60 mm minus 58 mm, and the resulting two mm.

However, this value is based on the current standard, the establishment of data collection classification specimens, so there is no direct comparability with the earth's metric standard, so there is an error, so it still needs to be compared with the extracted hair, from which a slight error with the earth's metric size can be obtained.

Of course, if we do not consider the external changes of the human body caused by the possible space-time distortions, planetary gravity, and physiological changes in the current space, there is no problem with this relative indirect transformation method.

And to measure, you need a caliper or micrometer, and the latter is more difficult to process, the former is easier, after explaining the principle, it took half a month to create a five-wire precision, about the earth's metric six-wire vernier caliper.

Through the final comparison, we can get an inaccurate conversion system, the current one-mile road, about 92 percent of the earth's metric system of one mile 500 meters, about 460 meters, up and down error of half a meter.

Then convert the volume and weight of water by size, and you can get one catty of Xianguo at the moment, which is about 475 grams per catty in China, with an error of ten grams up and down.

One acre of land is about 707 square meters of one acre in China, which means that 707 square meters produce three stones of rice, about 165 kilograms, which is still a very low value when converted into China's mu yield, and the potential for seeds to be improved is great.

It can be seen that for the peasant households who produce one stone per mu of thin land, without ploughing cattle and high-quality farm tools, even if a household of seven people is the standard, the mu of land that can be cultivated in one season can only be more than 20 mu, plus taxes and forced labor, the yield of one stone per mu can only maintain the lowest state of not starving to death at best, and a large number of people die due to natural and man-made disasters and wars, and low productivity is the inevitable result.

The topic returns to machinery, springs, gears, and bearings are indispensable as the three major parts of mechanical development, and research in advance can only be sooner rather than later, even if it costs money, it is essential to accumulate technology and experience.

Thanks to the development of mathematics, Bailiyan originally planned to start standardization next year, and initially formulated a set of simple mechanical standards, as well as steel performance testing methods, to lay a solid foundation for the future take-off of technology.

Due to the unexpected arrival of the alliance, the plan was completely interrupted, and it had to be postponed, and the Gonggong faction was allowed to sit in front of the matter first.

Cheng Jiyuan is very talkative, very keen to observe the prospects of new technologies, and the first thing that comes to mind is the suspension on the spring carriage.

After talking for two quarters of an hour, Cheng Jiyuan took over a cowhide bag from the hands of other masters, the pocket was wrapped in three layers inside and out, and when all of them were opened, there were several stacked white canvases inside, but after opening, the length and width reached half a zhang, which was eye-opening.

"Master Hou, please see, this picture is secretly sent by the head of the family to the old man's hands, it is a whirlwind wooden pillar car that my Ligong faction once built, which can make a smooth wooden pillar with a length of one zhang and two feet thick."

Bai Liyan also found a clue after taking a closer look, so he asked:

"This machine is pulled by a waterwheel as an external force, but this is the case."

"Yes, this whirlwind does require an external waterwheel to introduce the water into the whirlpool. In addition, it can also be pulled by animal force, but it consumes forage rations, so it is pulled by waterwheels. ”

"But this rotary wooden column car is mostly wooden, with flywheels, wooden shafts, and cow tendons to transmit force, there is no problem in processing wood, if it is to process copper and iron, I am afraid it is useless. Master Cheng, the Ligong faction once thought of making iron beds, supplemented by gears and iron shafts to drive machinery. ”