Canning refers to preserving food, I think I read somewhere that Napoleon offered a reward for an invention that would make it easier to supply his army, and the canning process won.
Spinning is the process of turning bits of fluff (cotton, wool) into thread. Then it can be woven into cloth. Mechanised spinning and weaving was a big reason the industrial revolution took off in England.
Ah, but aren't letters just symbols?
I just want to throw this out there; WIKIPEDIA IS NOT A LEGITIMATE SOURCE. Seriously, try using Wikipedia in a legitimate collegiate institution and see what happens. As a student of history, my professors specifically stated that Wikipedia was not allowed to be a source. Seriously, ANYONE can go on Wikipedia and write an article..
Using the argument that Wikipedia is unreliable because anyone can write an article is like saying that the Internet is unreliable because anyone can create a website, or that libraries are unreliable because anyone can publish a book.
Oh, well I don't know about canning, but spinning is completely covered by Replaceable Parts. Eli Whitney's cotton gin (which started the concept of replaceable parts) allowed large cotton harvests to be used in textile mills, so spinning is pretty unnecessary.
Mechanical spinning is covered by replaceable parts, but spinning was an important technology long before it was mechanised.
The Wheel. XCL
The Internet is unreliable, and not everyone can, in fact, publish a book. When it comes to research, going to the library is a lot more reliable than surfing the web.
Now, let us make 2+2: if we look at what lies between Sweden, China and the Balcans (occupied by the Avars) we see it is exacty the area which will become soon the Mongol Empire.
China would be overrun by the Mongols too, and the Avar, rather than invading Europe, where running away, together with all the other people in the Middle Age's "barbarian invasions", from somebody else in the east.
So, although not certain, it is nevertheless plausible that the mongols stumble upon the bright new idea, and started to capitalize on it.
good imagination. But more than 1000 years before the mongols rise, the Chinese were already fighting with the Huns, both the 2 nations were using stirrups then.
I don't know exactly who invented the stirrups, but I am sure it can't be the Mongols. They were born too late.
Necessity is the mother of invention, not "birthdate." The Mongols would have more need for stirrups than the Chinese would, so it's incorrect stipulation to say they couldn't have discovered the stirrup.
Mechanical spinning is covered by replaceable parts, but spinning was an important technology long before it was mechanised.
...Eli Whitney's cotton gin (which started the concept of replaceable parts)...
They were, however, cetainly not the first or original inventors of the stirrup. Besides, as the stirrup was known in Asia before the Mongols came on the scene and there is no evidence that they reinvented them in isolation, we should according to Occam's razor assume that the Mongols didn't invent the stirrup but adopted it from others.
I'm pretty sure that the cotton gin didn't inspire Replaceable Parts. I remember from grade-school social studies that the replaceable parts system was started in New England (NE United States) in the early 19th century to compensate for a lack of gunsmiths. It spread to Europe via England during the Great Exhibition of 1851, when an American industrialist impressed locals by taking a several pistols apart, mixing the parts and putting them back together. This system bore the Winchester rifle and the famous pistols of the West, both of which were mass-produced using - guess - replaceable parts.
In case anyone wants to know, this is why RP leads to Rifling: in order to field large numbers of rifles, you need a replacable parts system to make repairs more efficient and to allow mass production.
EDIT: Sorry for the double post!