"Give me an introduction." Huo Gang nodded.

"Yes."

"According to your plan, the new Yumen Pass will be expanded on the basis of the previous Yumen Pass, where the Yumen Pass is located, about two meters above the water surface of the swamp in the north, according to the current expansion area of the swamp, it will probably be larger than our entire Yumen Pass in the future, so on the north side, your general's mansion will be built on the north wall."

"On both sides of your General's Palace, there will be barracks for the Guards Cavalry, as well as the quarters of some key officials."

"The entire Yumen Pass will be horizontally and vertically reserved every 300 meters to reserve a large street, all the big streets under your requirements, we will reserve the excavation drainage system, in addition, according to the current people's home model, in a large area of 300 meters, will be about every 100 meters to reserve a small street, by a certain area of residents to form a community, these communities will have community officials in the future."

"In this way, the management and arrangement of grassroots communities can be more detailed and intuitive, and we have reserved the east and west cities, and at the same time, some shops will be reserved on the main streets."

"On top of that, in some hidden corners of the streets, we have reserved enough public latrines. Avoid any sewage. That's all the basic planning. Wu Ping roughly stated their plan.

Huo Gang nodded, there was no big surprise, but he didn't make a mistake, and such a square structure is actually a bit like Chang'an City.

However, the population of Yumen Pass is not destined to be as large as Chang'an City, of course, Chang'an City does not have so many people living within the city walls, and most of the population lives around the city.

It doesn't matter if this is true, Huo Gang doesn't pay attention to the situation on the ground, he pays attention to the situation underground, that is, the reservation of these drainage networks and the reservation of residents' residential areas.

Anyway, their city is almost equivalent to reconstruction, in this case, it is naturally better to do it in one step, especially underground drainage, Huo Gang doesn't want to be like later generations, just put aside the road surface for correction, the road surface in this era is not so easy to repair.

"How's the planning and design of the residents' houses?" Huo Gang asked.

"It's almost done, but it may take Miss Cailian to come and tell you."

Huo Gang was not in a hurry, he began to ponder, in terms of house design, Huo Gang has not yet made something as important, it was because there were not enough craftsmen, but now, craftsmen should not be a problem, so such things should be able to be taken out.

This kind of thing is glass, and the birth of glass can be said to produce many useful uses, but at present, Huo Gang's arrangement of it is only limited and concentrated, and this year, it is estimated that it can only be used for production and installation as windows.

And more useful natural binoculars, microscopes, as well as glasses! Last one aside, telescopes are of great military use, and microscopes are indispensable for the development of science.

Of course, it can also be used to make greenhouses, but it depends on the output of glass, in fact, the manufacture of glass is very easy.

"Give me ink." Huo Gang said a word to Wu Ping, and then picked up the brush and paper on the table next to him, and began to list them directly next to him.

First of all, the pre-technology of making glass requires the √ of the cellar furnace, the √ of oxalize or soda ash, the √ of quicklime, and yes, quicklime is used, so limestone mine is really a huge treasure, and in many industrial production, lime is almost irreplaceable.

The pre-technology Huo Gang has been completely lit, so the rest of the process is relatively simple, any modern person knows that glass is melted sand, that is, silica, and sand is not found in the Western Regions, but there is a lot of sand.

However, the temperature at which the sand melts into glass is 1,700 degrees Celsius, which is also within the controllable range of the furnace, after all, the temperature in the blast furnace is theoretically this temperature, but at least above 1,500 degrees Celsius.

Therefore, this temperature can also be reached, although it is more difficult, but just like the melting point of pure iron is more than 1500 degrees Celsius, but the melting point of iron ore with a large amount of carbon and other components is about 1100-1300 degrees Celsius and can be directly melted into molten iron.

Oxalize and soda ash mentioned by Huo Gang before can reduce the melting temperature of sand, and when heated, the temperature will allow oxalize or soda ash to be integrated into the sand, which can play a role in reducing the melting point.

Adding some quicklime to them can increase the durability and corrosion resistance of the glass, which will protect the glass from rain erosion and wear and tear.

In this way, the melting point of such a mixture is about 580 degrees Celsius.

This ratio is about 60%-70% sand, choose bright white sand, because such sand means purer silica, of course, if you can't find it, white quartz can also be.

But it doesn't matter if you don't have that, most of the sand will burn out when it melts, and the rest won't melt, that is, more color.

More colors are more colors, it doesn't matter. When the time comes, let Sun Er and them experiment, how to make the glass transparent.

Huo Gang was able to think of these things as well, thanks to his now constantly strengthened brain, his memory and previous memories became clearer and clearer, followed by the countless crossings he had seen in his previous life.

I really thank those authors, otherwise, he really may not know this knowledge.

In addition to sand, it is about 5%-12% quicklime and 12%-18% soda ash.

After they are completely melted, the liquid glass will continue to bubble like boiling water, which is the carbon dioxide in it is constantly coming out, and after the solution is no longer boiling, you can make glass.

Generally speaking, this kind of brown sand like a desert often contains iron oxide, so it will burn green glass, Huo Gang vaguely remembers that the glass in his home when he was a child contained a faint green color, just because of iron oxide.

If you want transparent glass, it's actually very simple, that is, add manganese dioxide to it when the raw materials melt, and it doesn't matter if the manganese dioxide can't be made at this time, Huo Gang remembered to throw some seaweed burning ashes into the raw materials to get transparent glass.

As for what seaweed is...... Anyway, there isn't much seaweed, so it's okay to experiment a few more times when the time comes, provided that&...... Huo Gang could expand his territory to the sea.

The glass is fired, and all that remains is to make the glass into a variety of glassware, or glass windows.

This is much simpler, the longest we have heard is to blow glass, blowing glass is that the liquid glass will become more and more viscous in the process of cooling, when it becomes similar to bubble gum, dip an iron pipe into a ball of glass solution, and then directly against the iron pipe can blow the glass solution into the shape of a balloon.

But this thing requires skill, but you want to make a glass bottle or something as simple as blowing it into a balloon and cutting off one end when it gets a little harder, which is the basic glass bottle or something.

Or, cut off the two ends of it, first turn it into a rough cylinder, then cut it vertically, put it on top of the iron plate and flatten it, this is the window glass. This method is simple to make, and it is also convenient, but the resulting glass is a little rough.

But when there is no problem with the windows, but there is another way, and that is mold, and the smartest thing about human beings is to use molds.

Make an iron cylinder, blow glass into the cylinder, wait for the glass to cool, take it out, then cut it lengthwise, heat it slowly, and then it will automatically slowly deform into a whole piece of glass.

In this way, it becomes more regular and transparent.

These are the basic glass production procedures, and as for the oxanine and soda ash that melt the glass, the oxalmine is very simple, the ashes left by burning the wood (hardwood has the best effect), you must completely burn the ashes left behind, dissolve them in water, and then boil them dry, or dry them in the sun, and the gray-white residue at the bottom of the pot is oxaline. The scientific name is potassium carbonate.

Oxaline can be used as a bleaching agent, can also be used to make soap is also a useful additive, and even steamed steamed bread can be used for fermentation.

But this thing requires a lot of wood, and one kilogram of wood can only get about 1 gram of oxaline. However, the heat generated by burning wood can be used to melt glass, and charcoal can also be used, but all in all, the cost is not low, mainly because Huo Gang does not have many forests in his hands, and he doesn't want to Huo Huo Forest anymore.

As a descendant, he knows very well how fragile the ecology of the Western Regions is, and that it is not bad at present, and if it is not cut down now and the water and soil are maintained, it will definitely not become a vast Gobi desert in future generations.

As for soda ash, there are two same methods, the first method is the same as making oxaline, but it is burned kelp, or plants in saline-alkali land can also be burned, but Huo Gang does not have either of them. The industrial method is relatively simple, make a water tower more than 20 meters high, heat the limestone at the bottom of the water tower, and then use the limestone again, and then produce the raw lime and carbon dioxide.

Then the carbon dioxide enters the solution containing a high concentration of ammonia and salt, and then it will form bubbles, so that the ammonia will become ammonium chloride, and the rest is sodium bicarbonate, commonly known as baking soda, which will be precipitated in the solution and concentrated at the bottom of the solution.

If you continue to heat it, sodium bicarbonate, or baking soda, will turn into sodium carbonate, water, and carbon dioxide. The rest is ammonium chloride.

The advantage of this method is that the remaining ammonium chloride continues to be added with hydrated lime (and used again), which will become pure ammonia, pure water, and calcium chloride.

Calcium chloride can be thrown away, or used as a de-icing agent.

However, this involves ammonia again, and Huo Gang found that the more he wrote, the more he wrote, the more he wrote a series of chemical industries. However, ammonia is not difficult to make, there is a lot of ammonia in human urine, and the gas produced by the fermentation of human urine is ammonia, which everyone smells when they go to the toilet.

In fact, industrial production is also simple, make a pressure cooker and heat it directly to about 450 degrees Celsius, and the nitrogen in the air and hydrogen will react to produce ammonia.