In 2005 ,COHO, the 'Coalition of Hassidic Organizations' published a unique demographic study of the Hassidic and Ultra Orthodox comunities of Greater Montreal.This was a landmark study ,possibly the first and only such made in North America.It was done as a 'needs assessment' and 'population projection' and funded by a grant frorm Canadian Heritage.We found the preface and addendum to be specially interesting, andare thnakfu forthe opportunity to share it wiith our readers.