•However, since a one-gramme standard would have been
difficult to use as well as to establish, they also decided that the new
definition should be embodied in a one-kilogramme artifact. This artifact
became known as the "kilogram of the archives". By 1875 the unit of
mass had been redefined as the "kilogram", embodied by a new
artifact whose mass was essentially the same as the kilogram of the archives.