Combine sugars, water, corn syrup, vinegar and salt in a 2-quart saucepan. Boil
over high heat for three minutes, but do not stir.
Remove from the heat, add butterscotch morsels and beat until smooth and morsels
are melted. The mixture will be thin. Stir in nuts and drop by tablespoonsful onto
ungreased foil or brown paper. Mixture may be thinned with warm water, a little
at a time, if necessary.
Let pralines stand at room temperature to set or chill
in the refrigerator.