Chapter 512 (1/2)
Strictly speaking, the processing technology of shells is lower than that of bullets. After all, the caliber of shells is much larger than that of bullets. In contrast, the fault tolerance rate is also higher.
But even so, it is much more difficult to produce an all metal shell than the shrapnel used by 55 mortars.
The machine developed by Jack Williams is said to be able to make shells, but in fact it can only make shell shells. For example, the primer of shells, the loading of propellants inside and the combination of warheads and shells are all realized manually.
Therefore, it is really troublesome to produce this kind of 76 mm caliber all metal shell shell.
Fortunately, the material used to make the shells, copper, was abundant in the Cherokee controlled territory.
Not to mention the Bingham Canyon copper mine, the world's largest open-pit copper mine near Salt Lake City, Utah, but the copper mines in Colorado alone are enough for the stone bear to have enough copper.
Later, Colorado and Utah used to be controlled by the arapahos, but now they have been collected by the stone bears. Therefore, all kinds of mineral resources in this large area have been gradually developed in the past three years.
In addition, there are many small copper mines in the original Cherokee's home, namely, the Appalachian Mountains, which were not found before. However, when he became the chief of the Cherokee people, he had asked them to look for such copper mines for a long time, and now many small copper mines have been found there.
It's just that one of these copper mines in the Appalachian Mountains is small-scale, and the other is mostly not open-pit, which is very troublesome to mine.
Many copper mines in Colorado in the later ages not only have large reserves, but also have high grade. There are many open-pit mines that can be directly mined. In addition, Shangjing is not far away from Colorado copper mines, and the Kansas river waterway can be used. Therefore, most of the Cherokee copper mines are now based on Colorado copper mines.
The most important thing is that copper is often accompanied by gold and silver
There is no doubt about the importance of gold and silver. Since a country will be established in the future, gold and silver, as precious metals, should be considered as reserves from now on.
In the future, whether it is to trade with Europe, or to realize the dream of crossing the Pacific to the other side of the Pacific to trade with China, it is inseparable from gold and silver. Even in later generations, gold and silver are important precious metal reserves of a country. In this era, of course, stone bear should pay attention to them.
In any case, Shangjing now has the rudiment of a metropolis. Perhaps the area of Shangjing is not as large as that of the ancient Indian cahokian civilization, but the number of Indians living in Shangjing has far exceeded that of the cahokian civilization which has disappeared in the flood.
In this regard, the stone bear is also very proud.
After all, it can be said that the city was built with his own initiative. And with this city as a template, more cities belonging to North American Indians will appear in this continent in the future.
Feeling the gradually warming spring breeze, looking at the foot of the city, the stone bear even lost consciousness for a moment.
The Guard officer came up quietly, a few meters away, and reminded the God like chief in front of him in a low voice: ”chief, high priest kabulu, great witch doctor bakaluzu, leader jorakululu, leader crazy lion, leader bighorn sheep, leader kalakao, leader Bigfoot, leader gaoniu, they are all here, waiting for you...”