Quote Originally Posted by gbwaterski View Post
I just measured my concentration in my pan it ranges from 15%-25%. That being said the average would be 20%. 86/20=4.3 gallons of sap to make a gallon of syrup. 12/4.3=2.79 gallons in the pan. that would give me a total of 11.29 gallons. That sill doesn't come out to what I think I should be getting.
If I remember correctly the jones rule can only be used for sap out of the tree. It's a weight/volume thing where the weight of sugar in low concentration sap is equal to it's volume or near enough. After the concentration goes up the calculations can get wonky and the rule doesn't apply well. I don't RO and I'm not enough of a math whiz to explain it but maybe this is the source of your problem?