NNJohn - The album you're thinking of is Saucerful of Secrets, not Meddle.

As for Meddle, if you open the cover all the way up and turn it on its side, its a picture of an ear, and its supposed to represent the way in which sound waves enter the ear. The Division Bell cover is supposed to represent the communication theme that is present in the album. Atom Heart Mother's cover is the result of Andy Warhol's comment that a cow is the most un-psychadelic image that you could come up with.

-Hob