Think of the word convert as meaning change, whether it is a person who adopts a new belief, or a changing action, such as when you convert dollars into euros. Many times we can catch a word's meaning by looking at its origins. In this case, the Latin con means around, while vertere means turn..
Maple sap runs best when it freezes at night (e.g. in the high 20-degrees Farenheit range) and then warms up above freezing the next day (in the range of 40-degrees Farenheit and hotter). If it stays warm at night and warm during the day or if it freezes at night but barely goes above freezing the next day, sap does not flow as well or hardly at all.
Filter the sap to remove any impurities. Maple Syrup Step #5 â Boil the Sap. Boil the sap until it reaches seven degrees above the boiling point of water on that day, or until it âapronsâ, or runs off a spoon in a sheet. Whenever maple sap is boiled, it tends to foam up and boil over the side of the pan.