It was first calculated by Josef Loschmidt in 1865, and an alternate measure, due to different standards, is known as the Loschmidt Constant.  
It was first calculated by Josef Loschmidt in 1865, and an alternate measure, due to different standards, is known as the Loschmidt Constant.  Its current name was given by Jean Perrin in his 1909 paper entitled, "Brownian Movement and Molecular Reality," changing the old naming standard of an uppercase "N."  The current number only applies when using the mass unit of a gram.  FTP, give the name of this number, whose value is 6.022 x 10^23, and is the number of objects in a mole.
It was first calculated by Josef Loschmidt in 1865, and an alternate measure, due to different standards, is known as the Loschmidt Constant.  
Avogadro's Number