“What is this?”The Nightinge looked at the black stone on the table and asked.

“The observant.”Roland did not lift his head, focusing on drawing the drawings in his hand.

“Black, what stone?”

"No, I'm talking nonsense."He sighed, looking at the shape and color, and the ghost knew what stone it was.He did not study geological exploration, pure metal to get in front of him is not necessarily distinguishable, not to mention ore.The only knowledge in the head is telling him that the ore is mostly complex compounds, impurities are different colors, for example, iron ore, hematite, sulfur ore, iron ore light from the appearance of the whole difference, especially sulfur ore, sometimes showing a light yellow metallic luster, often mistaken for gold, so there is a nickname of fool gold.

As for high temperature resistance... The compound itself does not have a fixed melting point, and it is also related to impurities and components, and the temperature alone cannot distinguish its varieties.Moreover, the metal element exists in an ionistic state, does not know the purification method, and it is useless to burn it.

“Do you know anything about it too?”The Nightinge was surprised.

"How much," Roland put down his quill and made himself a cup of black tea, "do you want to drink it?"

"No," she said, "no, no fried beef jerky, and you'll still have fish fills in your drawer."

Roland was silent for a moment and decided when he had not heard the words.This stone, he also intended to be thrown to the chief alchemist Kemo Squeir to deal with, the mineral is more or less radioactive, and it is not a good choice when it is placed in the office when it is decorated.

After the recent evolution of Soroya’s abilities, he found that he could suddenly make a lot more things.

The first is the water system, which is something that can greatly improve the happiness of residents.Think about it, sweating back home after a busy day, want to clean the slimy body, but found that the water tank is empty, but also to go to the nearby well to draw water, this feeling must be terrible.Moreover, Roland is also tired of the process of washing his face from the water tank, he always felt that the water in the tank can be placed in the tank for a few days to grow parasites, not to mention the water tank is rarely cleaned once a month, if you see carefully, you can see the water scale deposited at the bottom of the cylinder fluttering like a caterpillar.

If the water tower is used to supply water, there is no technical difficulty - using the steam engine to pump the water in the red water river into the water tower, and then rely on the principle of siphoning to flow into every household, a set of automatic water supply system is formed.The reason Roland has not been implemented is because of the material.

Water supply pipe either with iron, or copper, iron pipe does not do anti-rust treatment, with a few years to scrap.Copper pipe is the perfect water supply pipe, corrosion resistance, the inner wall is not squamous, non-toxic, and even copper ions and sterilization, but with the metal of the minted currency to do the water pipe.The output of the North Slope mine is far from the luxury to this point, even in the future, copper water pipes are also high-end housing will consider things.

At present, the border town is not only unable to export minerals, but even imported metal ingots.Therefore, whether it is iron or copper pipe, Roland can not bear to create a water supply system that cannot benefit and is purely used for enjoyment.

But now it is different, with Soroya's coating, which means that he can empty gloves white wolf, alone with magic to produce water pipes - such as taking an iron pipe as a mold, the outer bread on the paper, and then let Soroya cover the coating, and then pull out the mold to become a pipe.Even if such a water pipe is not pressure-resistant, as long as it is placed in a pipe with a cover plate.

The second is the power supply system... I am afraid that this can not be popularized in a short period of time, but let the castle full of light has always been Roland want to achieve, with a weak candle to read the book is too painful, and the eye damage is huge, coupled with the summer is coming, the sultry night to be full of torches and candles is how to feel?

With generators and wires, it doesn’t seem so far away to get the castle into the electrical age ahead of time.As for the filament of the light bulb... he vaguely remembered that before the use of tungsten wire, people generally used carbonized bamboo silk to make incandescent lamps.Bamboo is not a rarity, but it is found in the woodlands south of the Redwater River.

However, what the border town needs most at present is the metallurgical facilities.The production of iron is directly related to the scale of mechanical production and weapons manufacturing, and it is also the foundation for the survival of small towns.

“Did you paint this... a tower?”The Nightinge sat at the table and asked curiously.

"Almost," nodded Roland, "but it is empty, used to fill fuel and ore, and act like a furnace, to smelt iron ore into raw iron."

This is the blast furnace - an upgraded version of the ancient vertical furnace.

Losia designed and manufactured the vertical furnace he had been to the construction site to see, to be honest, this stove in addition to small capacity, low temperature, the structure has been very close to the stove, if not the evolution of Soroya so that the town has the ability to produce refractory bricks, he had intended to build a dozen more such vertical furnaces.

With refractory bricks, it is natural to consider the furnace temperature is higher and the output is larger.

The height of the new design blast furnace is nearly eight meters, which is more than four times the vertical furnace; the furnace is in a tower shape, and the inner diameter is three meters, in order to prevent collapse, there is a support frame at the bottom.The furnace wall is thick, the abdomen is up to half a meter thick, the innermost layer uses the soroya coated fireproof brick, and there is a circle of air supply, and the steam engine will pump the air into the abdomen of the furnace.

In order to take full advantage of the steam engine, Roland also designed a set of automatic feeding equipment for the blast furnace, including a specially supplied car with a climbing rail and a moving door at the bottom.After the car climbs to the top of the furnace under the traction of the steam engine, the buckle at the bottom of the car will be hooked into the hook, so as to open the inverted mouth and pour fuel or ore into the furnace.In this era, this system is considered to be the top technology.

Unlike large openings and low-calorie vertical furnaces, once the blast furnace is put into production, it will not stop working for a long time, and it must be continuously invested in fuel and ore, and the output is much higher than the vertical furnace.As long as five or six blast furnaces are built, the town's pig iron production will increase exponentially.

...

Drawing complete drawings, Roland rubbed a little sour wrist, moved a box from under the table and pushed it in front of her.

The Nightingue nodded, “Is this...?”

"Well, I was going to give it to you sooner, but it took some time to carve it, after all, the machines in the factory were not very skilled," Roland smiled.

She opened the box and couldn’t help but wonder.

There were two revolvers staggered inside—unlike the prototypes used on the day of the Carterby trial—the two pistols were shiny in silver, the surface was bright enough to reflect the figure, the handle and the gun body were engraved with exquisite patterns, and the barrel was also emblazoned with the name of the nightinge: to Veronica.

The project had been brewing in Roland’s head for a long time.Compared with carrying inconvenient, the use of trouble-prone forward flintlock guns, the newly developed revolver has been quite perfect, both in safety and firing rate, have remained at a high level.A witch like the Nightinge, who is extremely capable, has a gun in her hand, and it is expected to think.

“Thank you,” she said with a smile, picking up two pistols and jumping off the table, more than a shot-and-shoot pose, “will you teach me how to use them?”

"Of course," Roland nodded, the other party's white assassin's suit plus a dazzling smile, so that he instantly understood what is called handsome to no friends, "it is not difficult, as long as you sneak into the target, pull the trigger, and shout at noon has arrived."(Unfinished.