"jim" > wrote in message
...
> Hi Gene, alcohol is definitely less dense than water, but if a wine at
> 1.000 is not quite dry, why do they calibrate 1.000 with 0PA? Do you
> see why I think it is confusing?
>
> Jim

The scales on a hydrometer are like a snapshot. A picture of a
moment frozen in time. That picture is of a prepitch must with
no alcohol in it. Once alcohol enters the picture, the claibration
on the hydrometer is no longer valid. HTH

Frederick