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From: (Don Wilkins)
Newsgroups: rec.crafts.metalworking
Subject: Re: Hydrochloric and Muriatic Acid
Date: Sun, 10 Oct 1999 23:59:25 GMT

On Sat, 09 Oct 1999 23:52:27 GMT, Robert Bastow <>

>It is easy to see why the Baume scale is still preferred by many!

Not so fast there. Don't forget that this Baume guy was French
(1728-1804) and it ain't quite so simple as having one table for all

There is a "heavy" Baume scale for liquids more dense than water and a
"light" Baume scale for liquids less dense than water.

In the "heavy" scale 0 degrees Baume is a sp. gr. of 1.000
 (water at 4 C) and 66 is a of 1.842.

In the "light" scale 0 Baume is equal to the sp. gr. of a 10% solution
of sodium chloride and 60 degrees is a sp. gr. of 0.745.

For the heavy scale the conversion is

Sp. gr. = m/(m-d)

Where m = 145 (in the USA)

But m= 144 (in Holland)

And m = 146.78 (new scale or Gerlach scale)

Then there is the light scale.

Degrees Baume = (140/sp. gr.)-130

And if that isn't enough there is the Beck Hydrometer, Brix
Saccharometer or Balling Saccharometer, Cartier's Hydrometer, the
Oleometer, Soxhlet's Lactometer, and Twaddell hydrometers (note the
plural), e.g.

Dealing with percent composition doesn't look too bad and even
molarity starts to look good.

<balance deleted>

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