Checking the Progress of the Syrup



Boiling Maple sap in large kettles on open fires was the preferred method of producing maple sugar for years. Here, an Indiana Dunes National Lakeshore volunteer checks the progress of the boiling sap. Still thin and colorless means it had a long way to go before it became syrup. Around 80 percent of the liquid must be boiled off of the sap to produce a sweet syrup.

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