a1 Département de mathématiques, Université Paris-Sud, 91405 Orsay, France
a2 Département de mathématiques, Université du Québec à Montréal, Montréal, P.Q. H3C 3P8, Canada
The notion of packing measure, introduced in ,  and , has been used by comparison with Hausdorif measure to study the regularity and rectifiability of sets in the plane . Since a few technical mistakes can be found in , lemma 5·11 and , lemma 3·2, we wish in this paper to give the corresponding exact proofs, together with a natural development of this theory in higher dimensions.
(Received March 17 1987)
(Revised May 28 1987)