Just bought an old hydrometer made by a french company "DuJardin, de Salleron" could be anywhere from 120 to 50 years old, What is weird is that has a strange scale on it which runs from 3 at the top to 6 at the bottom,
It could possibly be the DuJardin scale which is "A hydrometer scale used in making wine. It reads in the potential percentage by volume of alcohol in the finished wine, assuming all the sugar were to be converted to alcohol."
however 3% to 6% is a bit off for wine, is it not ?
Has anyone seen this scale before? The information on the packaging is in French and my limited knowledge of the language seems to indicate that it is calibrated at 65.5 deg F (or 18.6 deg C) but there is no mention of the scale.
I don't have a trial jar deep enough at the moment to find '0' on the scale but i'll get on it presently. (Note to self: glass trial jars break when dropped on a concrete floor)
cheers in advance for any advice or information.
It could possibly be the DuJardin scale which is "A hydrometer scale used in making wine. It reads in the potential percentage by volume of alcohol in the finished wine, assuming all the sugar were to be converted to alcohol."
however 3% to 6% is a bit off for wine, is it not ?
Has anyone seen this scale before? The information on the packaging is in French and my limited knowledge of the language seems to indicate that it is calibrated at 65.5 deg F (or 18.6 deg C) but there is no mention of the scale.
I don't have a trial jar deep enough at the moment to find '0' on the scale but i'll get on it presently. (Note to self: glass trial jars break when dropped on a concrete floor)
cheers in advance for any advice or information.