[Thursday's third bullet! ] Roll all over the floor and ask for collection! Ask for recommendations! All kinds of requests! 】

“…… The length of the gun tube was measured to be 4 feet 2 inches......"

Tang Jiniu measured it with his ashwagandha ruler, which was slippery and did not leave his hand, and said thoughtfully, before he finished speaking, he was interrupted by Chu Fan.

After Chu Fan stretched out his hand to ask for his ruler, his brows furrowed - I saw that this wooden ruler was three feet long, and each foot was divided into ten points, and then ...... And then there is no more!

In other words, the accuracy of this ruler is in inches! Below an inch can only be estimated!

After a visual inspection, this ruler is about thirty centimeters long, that is to say, one inch is more than three centimeters, and below three centimeters, it can only be felt, this error - Chu Fan simply didn't dare to think about it anymore.

“…… The wooden support from the tail of the gun to the barrel is three feet and one inch long. The carpenter next to him who was holding the wooden butt to measure the length finished the measurement, and reported to Chu Fan - a Lumi gun had been completely disassembled into a pile of parts, and three craftsmen were measuring the length of each part.

Chu Fan glanced at the ruler in the carpenter's hand, it seemed to be different from Tang Ji Niu's, and when he wanted to come over, his jaw would fall off - the carpenter's ruler was less than a centimeter longer than Tang Ji Niu's, and the three feet added up to the length of a fingernail!

No wonder all the birds of the Ming Dynasty look so individual! It's no wonder that such a tool, with such tolerances, can grow the same!

"Son, our ruler is different from Master Tang's, we are measuring the ground, and he is the construction ruler." The carpenter looked at Chu Fan's face in astonishment, and quickly explained.

Measuring the ground? Build a ruler? What other rulers?

"Back to Gongye, there are still ...... Tailoring ruler, that's for tailors. Tang Jiniu saw Chu Fan's uncertain face and replied cautiously.

Chu Fan closed his eyes and took a deep breath, silently saying in his heart Don't get angry, don't get angry-he was really mad by this fucking weight of the Ming Dynasty!

After suppressing the anger in his heart, Chu Fan asked about the volume and weight again, and it was actually the same as the length, all kinds of chaos.

It seems that if you want to standardize production, unified weights and measures are the first thing to do!

"Masters, I don't care what you were like in Beijing before, from today onwards, everyone must use the same ruler, and one foot is so long!" Chu Fan held Tang Ji Niu's construction ruler and glanced at the three craftsmen.

"Childe, are you saying that we will all use construction rulers in the future?" The carpenter muttered.

"Nope! It's Ushijima ruler! Chu Fan shook his head and said, in order to give everyone a deep impression of the unified weights and measures, he decided to use a new term, "From now on, whether it is a blacksmith, a carpenter, a tailor, or a master who builds a house, everyone!" Remember, it's everyone! You have to use a Ushijima ruler! ”

After finishing speaking, he looked at the three stunned craftsmen and continued, "Not only the ruler, but also the shengdou must be unified!" I'm going to make Ushijima Sho and Ushijima Fight! There are also two ...... of Niudao Jin and Niujima I can't control anywhere else, but on Ushijima, all our weights and measures must be the same! ”

After saying that, he had the stonemasons called, and together with the stonemasons, he made a one-foot-long stone ruler as a ruler, and the upper inch was accurate to the minute—that is, one-tenth of an inch, about 3 millimeters.

This ruler took Chu Fan about two hours, and after it was done, he asked Chen Shangren to post a notice in the name of the East India Company, anyone who needs to use a ruler - whether it is a straight ruler or a curved ruler - its length standard must be used according to the mold ruler to create a corresponding wooden ruler, once it is found that someone is still using those messy tailoring rulers and building rulers, the money will be deducted!

As for the task of building the mold ruler, Chu Fan gave it to Tang Jiniu, who was the head of the three craftsmen in the Ministry of Works, and Chu Fan felt that he was fully capable of managing the future manufacturing department.

After dealing with the matter of the mold ruler, Chu Fan drew drawings for the stonemason to make him build standard measuring tools: stone, bucket, liter, and combination all create standard molds; Jin, two, and money also weigh the corresponding weight of the stone scale - the reason why the stone is used, Chu Fan is worried that the metal will corrode, which will inevitably lead to inaccurate measurement in the future, and although the stone is brittle and easy to break, these molds are not used for use, but are copied as standards, so there is no hindrance.

After explaining clearly to the stonemason, Chu Fan found another jeweler and asked him to make a vernier caliper - why choose a jeweler? It's because he usually creates all kinds of fine jewelry, and he is particularly sensitive to fine scales.

He tossed and turned until twelve o'clock in the afternoon, and when he saw that the meal was ready, the food was delivered from the kitchen.

Sun Hedou saw that Chu Fan, like those craftsmen, took a big bowl full of food and started eating without any fanfare, exactly like his father in the workshop, his heart couldn't help but move, and he also picked up the big bowl and served the food, and sighed and snorted and ate.

Seeing that his uncle and brother were all doing this, Zhang Ziyu had no choice but to follow suit, but he was really reluctant in his heart, so he was a little picky - he was a rich son, and he was dressed and fed on weekdays, so why did he eat so casually?

Zhang Ziyu was not happy in his heart, and his mouth brought out a little anger, "Uncle Xiao, I see that you tossed all morning, just to let these craftsmen use the same ruler?" That's too much fuss, isn't it? ”

When Chu Fan heard this, he put down his chopsticks and said, "How is it a big fuss?" It's just a big fuss! …… What is the most important thing for us to learn from the West? Experiment! Verify what you think with practice...... Doing experiments involves a variety of measurements, such as length, weight, volume, and ...... For example, if you want to convince people that the volume of a cube is equal to the length of its sides multiplied by three times, do you have to use a construction ruler, a tailoring ruler, and a measuring ruler to do it once? …… Aren't you tired and panicked? ”

Such a simple truth made Zhang Ziyu speechless, but it caused Sun Hedou to think deeply - when he followed Sun Yuanhua in the workshop, he also saw his father ask his craftsmen to use the ruler uniformly, but he never thought about the benefits of doing so.

After Chu Fan took a few bites of food, a hint of disapproval flashed on the carpenter's face out of the corner of his eye, knowing that it would take a little effort to convince these guys who were sticking to the old rules.

"As for construction, this unified weights and measures are even more important," Chu Fan thought for a while and said, "Take the Lu Mi Gong that we are going to imitate now, the carpenter told the blacksmith that the wooden tray should be placed in the place of how many inches the gun pipe, so the blacksmith still has to think about whether this is a construction ruler or a measuring ruler?" …… Isn't this a waste of time? ”

The carpenter surnamed Mao thought about it after hearing this, but he still shook his head imperceptibly, Chu Fan was almost finished eating at the moment, and he thought of a way to convince these old stubborns.