flights of fancy (Hejira). She has dabbled with jazz and African tribal music, ventured deep inside herself and fled far away. But, always, the unpredictable caliber of her work has been as exciting as it is frustrating. Now, for once, she has gambled and lost. The best that can be said for Don Juan's Reckless Daughter is that it is an instructive failure.

Since Blue, Mitchell has demonstrated an increasing fondness for formats that don't suit her. Not that this awkwardness can't be occasionally successful: on Hejira, she clung so resolutely to even the stray flat notes that the impression was an attractive one of stubbornness and strength. But, increasingly, Mitchell's pretensions have shaped her appraisal of her own gifts. At her best, she is a keen observer but not a particularly original one, and she has never been an interesting chronicler of experience other than her own, though the new LP finds her trying. Instead, she has been inexplicably inclined to let her music become shapeless as she tries to incorporate jazz and calypso rhythms that eventually overpower her. Her most resonant lyrics have been simple and concise, spinning out images rather than overburdening them, but lately the endearing modesty of "California" or "Just like This Train" seems far behind her. These days, Mitchell appears bent on repudiating her own flair for popular songwriting, and on staking her claim to the kind of artistry that, when it's real, doesn't need to announce itself so stridently.

Don Juan's Reckless Daughter is a double album that should have been a single album. It's sapped of emotion and full of ideas that should have remained whims, melodies that should have been riffs, songs that should have been fragments. At its worst, it is a painful illustration of how different the standards that govern poetry and song lyrics can be, and an indication that Joni Mitchell's talents, stretched here to the breaking point, lend themselves much more naturally to the latter form. Her writing works best when it's compact, yet the record's expansive mood forces her to belabor, in the title song, the precious contrast between a snake (or a train, as well as the author's baser instincts) and an eagle (or an airplane, plus a longing for "clarity") for nearly seven minutes. Mitchell's music has evolved into a kind of neutral background, rolling on endlessly in either a languid spir