Chapter 40: Formulate Units of Measurement (Please Collect and Recommend)

When the temperature dropped slightly, Luo Chong could not wait to smash the mold with a stone. In the clay fragments, a large axe head with a pale golden color and shining light lay quietly there.

The axe head was slightly larger than the axe head of a fire axe, and there was a reserved hole for the handle on it. The work of grinding the axe blade was given to the lame man, and Luo Chong began to prepare for the second furnace casting.

4:1.5 ruler and plate saw, 5:2 carving knife, 4:1 chisel, 3:1 planer, 4:1.5 hand drill, 4:1 four-sided gun head.

The hand drill is to first cast a 'T'-shaped bronze flat sheet, and then heat the drill head part in the fire. After it is red, use two square bricks to clamp the drill head, twist the copper sheet into a spiral drill head like twisting a twist, grind the blade after cooling, and then add a wooden handle to drill holes in wood.

When the tribesmen came back in the evening, all the work stopped. There were four small earthen furnaces, two for smelting and two for purification. The output was very low. At the end of the day, most of the charcoal was consumed, and only about 40 kilograms of copper and tin plates were produced. However, Luo Chong did not bring back much ore, so he could make do with it for the time being.

The golden axe, with a sharp edge, was inserted with an axe handle made of a cannibal tree sapling, and the joint was glued with fish maw. A golden large fire-fighting axe was completed.

There were also two board saws with wooden handles, one large and one small, one for two people and one for one person.

Luo Chong called the exhausted logging team. Today, they broke four more stone axes, which were seized from the cannibals. Now there are only a few left.

When Dashu and his team saw the golden axe, they immediately surrounded it. They also saw the board saw, but did not know how to use it.

"What is this made of? What a beautiful axe." Dashu's eyes were almost glued to it.

"Haha, there is also this." Luo Chong smiled and took out a spear with a white shaft and a golden head. The bronze spear head was in the shape of a flat quadrangular pyramid, 30 cm long, with a round tubular groove at the end. A white wooden shaft smeared with fish maw was inserted, with a total length of 2.5 meters, which looked murderous.

The tribesmen were all stunned. Is this still a spear? It is too beautiful. Especially Shouya and Du'er, who have been used to using wooden spears for a while. Now seeing this golden-headed spear, they were drooling.

"Chief, what is this made of? Do you have any more? Do you have ours?"

The tribesmen asked impatiently, but they also knew that if there was only one, it would definitely not be their turn to use it.

Luo Chong smiled and took out a piece of brass ore and handed it to Dashu, "It is made of this kind of stone. There is not much now. You know we didn't bring back much."

The people of Yuanshu tribe were stunned. They had dug this kind of stone before, but the things made of this were different from stone. It didn't look like it was made of stone at all.

The wooden pig was the most honest and the most direct. Since there were few, let's go dig some more stones. "Chief, let's go dig some more stones. We know where they are."

Luo Chong nodded, but told them that digging this way was too little. He had to make some things first. After this winter, he could dig a lot of them back. By then, everyone would have such a spear. Now let's work hard.

The tribesmen calmed down. The chief's words were still credible. Since he said that everyone would have one, then everyone would definitely have one.

Then Luo Chong took them to the wood they had cut back and taught them how to use the board saw and hand saw.

The board saw pulled by two people was placed on the end of the log. They pulled back and forth, and sawdust like dust fell down. It didn't take long to saw off a round piece of wood, which made everyone marvel.

The hand saw used with one hand was used to clean the branches. The side branches as thick as the wrist were sawed off in less than a minute, and the fracture was smooth, unlike the bumpy ones split with a stone axe. In this way, the utilization rate of the wood would be greatly increased, and it would save labor and effort, and the speed would be very fast.

The one-meter-long axe was also very easy to use. It took all the strength of the whole body to swing it. If the Han tribe used it vigorously, a tree as thick as a person's leg could be cut down in just a few strokes.

Luo Chong checked the axe blade. Because the axe blade was relatively thick, there was no sign of collapse.

After everyone learned how to use these tools, Luo Chong asked them to have a meal and rest.

After dinner, the tribesmen gathered together to listen to the lame man's story about copper smelting, while Luo Chong began to formulate various measurement units.

Only with measurement units can we slowly develop civilization and move towards industrialization, or rather, towards agriculture. Otherwise, when we plant rice next year, how can we calculate the area of ​​one mu of land and how many kilograms of grain are produced in one mu of land?

Of course, this is also very simple. As long as we have a length standard first, everything else is not a problem.

Luo Chong used a carving knife to carve a scale on the copper ruler. With the width of the ring finger nail as one centimeter, he carved a one-meter-long ruler. He brushed melted tin water in the groove of the ruler and polished it again. In this way, he had a gold ruler with a silver scale.

On the basis of the length unit, the area unit was established as square centimeters, square decimeters, and square meters. 667 square meters equals one mu. No matter how large it is, it is not used now. Let's talk about it later.

With this length unit standard, we can measure the volume and set the capacity unit, which is liter, which is one cubic decimeter; 125 liters equals one dou, which is 1/8 cubic meter.

The unit of weight is even easier. It is said in the junior high school physics textbook that 1 cubic centimeter of fresh water weighs exactly one gram, and half a liter of water is 500 grams, which is one catty. One liter of water is one kilogram, and 1000 kilograms is one ton.

The unit of angle is also easy to find. A circle has 360 degrees. Just find a standard right angle. Make a water tank, tie a stone with a hemp rope to make a plumb bob, sink the stone into the water, and the angle formed by the vertical hemp rope and the horizontal plane is the most perfect right angle. With this right angle, you can use the formula for the sum of the interior angles of a triangle to calculate various angles.

Luo Chong has always felt that as a time traveler, he obviously has a mature and scientific measurement system, but he still has to use the obsolete unit system of inches, feet, and feet. That is simply asking for trouble.

And facts have also proved that the decimal unit of length is most conducive to the development of science.

Anyway, he is the boss now, and he is the one who sets the standards for this world, so why should he make himself uncomfortable?

The women had stopped collecting wax. There was enough wax for now. The sisal had also been collected. Now they were concentrating on making ropes.

The children were lying outside the rabbit pen, watching the rabbits inside give birth to baby rabbits. The three pregnant rabbits had all given birth, and there were quite a few of them. Each litter had six or seven. Twenty more lives were born, and the herd of more than 30 rabbits had nearly doubled. Luo Chong had to sigh at the reproductive capacity of rabbits.

The lame man had a long experience in pottery making, and now he could help Luo Chong carve wax models. The round-headed iron shovel or copper shovel was to be cast in batches. It could be used for many things, whether it was digging a river or farming. With the sample Luo Chong gave him, the lame man could copy it without any problem.

Luo Chong himself was studying the most critical thing, the plow. He had very little contact with this thing, so he could only figure it out based on his limited memory. He was also going to make two sizes, the big one for the Deinonychus and the small one for the Maluku. The one for the Maluku was for ploughing the land, while the one for the Deinonychus was for digging a river.

They must be used to dig the river, otherwise Luo Chong would not be willing to eat so much grass every day.

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Yesterday I received a notice that the test will be on the 3rd, so I adjusted the update time. From tomorrow, it will be changed to 10 am and 6 pm (I heard from others that the update rate is higher during the day).

For the time being, there will still be two updates a day. It is really impossible to update so much during the new book period, but there will be more updates on the Spring Festival.

Thank you for your support for so long. The test will be tomorrow. How the performance of this book depends on you. If you have recommendation tickets, please remember to leave them for me. Thank you very much! ! !

(End of this chapter)