Green Tomato Pickles

Ingredients

1 gallon green tomatoes sliced (16 cups)
onions
red and green peppers
1/4 cup salt
1/2 Tbs powder Alum
3 cups vinegar
4 cups sugar
1/2 tsp cinnamon
1/2 tsp allspice
1 cup water
1 Tbs mixed spices
1 Tbs celery seed
1 Tbs mustard seed

Instructions

Slice tomatoes, onions and peppers
sprinkle with salt
Stand overnight