How Did Scientists Determine Avogadro's Number?

[John Galaor]

I never had found the reasoning process by which scientists arrived at that precise Avogadro's number. I suppose it was a slow and painful process.
So, anyone knows the path they followed to arrive to this precise number?

I don't want anyone to explain me the meaning of that number.
I know this well already.
John Galaor
.

 

[mathman]

http://en.wikipedia.org/wiki/Avogadro_constant

The article describes several methods for measuring the number.

 

[John Galaor]

Thank you very much. I will tell you how I manage with it.
John Galaor
.