JSTOR is an element of ITHAKA, a not-for-revenue Group supporting the tutorial Group use electronic systems to preserve the scholarly record and to progress study and teaching in sustainable ways.P?ruv??n C????n? is ?n? ?f th? ?ur??t f?rm? of C????n? that ?? f?und ?n th? ?l?n?t. It truly is u??d b? ????l? ?? ?t?mul?nt t? ?n?r???? th? ?r?du?t??n ?fi