1. a small enclosure in which animals are restrained for handling or on a long term basis for intensive feeding. Called also corral. 2. female swan. add-on pen. in a feedlot, one in which cattle are put together a few head at a time over several days or weeks. Has a risk for health problems. pen check. the daily or twice daily examination of cattle in a feedlot to detect any sick animal.
Maple syrup boils at 7.1 degrees Fahrenheit above the boiling temperature of water, so a good thermometer can be used to determine when it's syrup and and the density can be measured. Â°Bx Degrees Brix (symbol Â°Bx) is the sugar content of an aqueous solution.
Experts claim 4 to 5 days without losing quality but if kept near freezing or completely frozen this can be much longer. And don't listen to that other answer, you DO NOT add ANYTHING to the sap or syrup. Maple syrup is all natural sugar. I done this kind of stuff as a kid.