Michael Parker and his son, Joshua, use a hydrometer to check the density of maple sap as it's pumped out of the evaporator after being heated to a temperature of 419 degrees F in the sugar house at Parker Family Maple Farm in West Chazy. The density of the sap determines the temperature it needs to be heated to, which changes according to the barometric pressure.
(P-R Photo/Gabe Dickens)
Michael Parker and his son, Joshua, use a hydrometer to check the density of maple sap as it's pumped out of the evaporator after being heated to a temperature of 419 degrees F in the sugar house at Parker Family Maple Farm in West Chazy. The density of the sap determines the temperature it needs to be heated to, which changes according to the barometric pressure.
(P-R Photo/Gabe Dickens)
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