Peanut Brittle
["1 c. cold water", "1 c. Karo (white)", "2 c. sugar", "2 c. raw peanuts", "1 tsp. salt", "1 tsp. soda", "2 Tbsp. margarine or butter"]
["Note: Use a candy thermometer."]
["cold water", "sugar", "peanuts", "salt", "soda", "margarine"]