Zhao Feng also knew that these two people would definitely do their best to complete the task he commanded, and all along, the two of them did exactly that!

Therefore, Zhao Feng didn't worry about anything when he left the blacksmith shop.

Just when Zhao Feng had just left the blacksmith, he suddenly thought, how could there be no hot air balloon? So, Zhao Fengfu returned to the blacksmith shop.

He didn't bother Master Wang and Ma Jun again, but went directly to the workshop where he studied glass. Ever since he worked with Master Li and his apprentices to make glass, he has never asked about this matter, whether it is the improvement of glass craftsmanship or how much money the glass workshop makes by selling glass products.

Naturally, to what extent the current glass process has developed, he naturally does not know! Whether it will be able to live up to his expectations, whether he will be able to make what he wants - a telescope, is still unknown!

When he came to the glass workshop, he saw that the craftsmen in the workshop were still busy, but when he saw the finished glass on the side that he didn't know whether it was a finished product or a defective product, Zhao Feng's eyes couldn't help but light up, there were basically not many bubbles on the glass, and the color of the glass was much lighter!

Zhao Feng walked closer, picked up the piece of glass, and looked at it carefully.

"My lord?" A surprised voice came, and it was Master Li, the head of the glass workshop, who made the sound.

"Master Li, after so many years, I haven't asked much about the situation of this glass workshop, tell me, how is the glass workshop now?" Zhao Feng smiled slightly.

"Yes! Lord, now our glass workshop is basically making bubble-free glass, but we still haven't made transparent glass! Speaking of this, Master Li grabbed his head in embarrassment.

"It's okay, is this the most transparent glass right now?" As he spoke, Zhao Feng raised the glass in his hand.

"It's not!" Master Li shook his head, "This piece of glass is a defective product, there are still some bubbles on it, and the color is not so light!" ”

"Is there anything lighter than that?" Zhao Feng was overjoyed, the glass in his hand was already very light in color, but Master Li even said that its color was not so light, doesn't this mean that there is a lighter one, what is the difference between that kind of glass and the transparent one?

After a while, Master Li brought another piece of glass, and indeed as Master Li said, the bubbles on this piece of glass were much less than the one in Zhao Feng's hand, and there were basically no bubbles anymore. Moreover, the most important thing is that the color of this piece of glass is really as Master Li said, it is much lighter than the one in Zhao Feng's hand, Zhao Feng estimated that the light blue glass used as a window in later generations does not seem to have this color!

Zhao Feng was naturally very happy when he saw this, there should be no big problem with such a glass manufacturing telescope, although it seems that the effect is not as good as transparent glass, but it is also very good!

"Good, I have something I want you to make now!" Zhao Feng is very satisfied with this, after all, the level of craftsmanship in ancient times is there, and Zhao Feng is not easy to force anything, to be able to do what he is now, it is not easy in Zhao Feng's opinion!

"My lord, please speak!" Receiving Zhao Feng's affirmation, Master Li was naturally very happy.

"Uh...... Whether there is pen and paper, just say I don't understand. Zhao Feng asked a little embarrassed.

"It was my negligence, negligence!" Master Li smiled and then ordered a young man behind him, "Gao Zhan! Go get the pen, ink, paper, inkstone! ”

"Okay!" Gao Zhandao.

Soon, the pen, ink, paper, and inkstone were taken, Zhao Feng frowned slightly, he only found out now that the pen, ink, paper, and inkstone were so inconvenient, it seemed that he needed to invent hard pens such as fountain pens and ballpoint pens!

Although Zhao Feng thought so in his heart, the movements of his hands did not stop.

Under the gaze of Master Li and Gao Zhan, Zhao Feng drew two lenses identical.

"What is this?" Master Li asked puzzled.

"I call such a convex lens with two convex ends, and such a concave lens at both ends!" Zhao Feng said with a smile.

Zhao Feng not only wanted to invent the telescope, but more importantly, he had promised Hua Tuo and Zhang Zhongjing to let them see the bacteria and fungi under the onlookers, so the simple microscope was also what he wanted to invent!

Of course, in the eyes of outsiders, Zhao Feng is an invention, but Zhao Feng knows what is going on, and it is completely the crystallization of the wisdom of his descendants who are plagiarizing it! But so what, Yas Jensen and Hans Lipper (inventor of the microscope), Hans Lipole (inventor of the telescope), these three guys have not yet spoken, and by the time they do, it will be more than a thousand years later!

Zhao Fengcai doesn't care about this, if he waits for more than a thousand years? At that time, Zhao Feng was already a pile of white bones, how could he have so much time to wait!

"I don't know both...... Forehead...... What is a lens used for? Master Li asked. I'm still complaining in my heart, Zhao Feng's name is really awkward, lens? But it seems that this is really the case, a transparent mirror-like thing, isn't it a lens!

"Hehe, secret!" Zhao Feng smiled slightly, "If it's a size, it's ...... That's it, that's it! ”

As he spoke, Zhao Feng drew a few circles on the paper and wrote down the diameter data.

"Be careful, it must be round!" Zhao Fengdao.

"Yes, my subordinates understand!" Master Li nodded.

"Well, I believe that with the current technology, it shouldn't be difficult to do this, make it for me as soon as possible!" Zhao Fengdao.

"Rest assured, the lord will guarantee the completion of the task in three days at most!" Master Li patted his chest and reassured.

"Okay, I'm waiting for your good news!" Zhao Feng nodded, turned around and left the glass workshop, he still had to go to Master Wang's place Since the lenses have been arranged to be manufactured, he naturally wants to make the barrel of the telescope, otherwise, will he let the military general take the two convex lenses and focus by himself? Find it yourself, how can you see the farthest distance?

This is obviously unrealistic, in addition, Zhao Feng has to at least let Master Wang make a few fountain pens first, even if they are dipped in water, they are much stronger than the current brushes, and now as long as they write something, they need pen, ink, paper, and inkstone, which is really a bit troublesome! This is what Zhao Feng wants to improve, and it must be improved!

(End of chapter)