Clam Chowder

I am not sure if Mom meant to make a white sauce using separate ingredients from what is listed, or using the flour, butter, half & half and salt here. I am going to assume she meant using those ingredients.... although that would make a large batch of white sauce. Try as you may. But, if you are making this for guests, you may want to try making it beforehand to test it out!

2 cans baby shrimp and juice
1 cup finely chopped onions or dried onions
1 cup chopped celery
2 cups finely cut potatoes
¾ cup butter
1 quart half & half
½ cup flour
½ teaspoon salt
pepper to taste
½ teaspoon sugar
1 to 2 tablespoons red wine vinegar

Make white sauce. Combine with the rest and cook in crock pot.