Sound arguments appear from the name, was probably a carbonate.

Cream Bacon and Fried Eggs Baked Potatoes Rye Muffins Coffee ☸☸☸☸☸ Watermelon Old Grist Mill Rolled Oats 4½ cups 30 minutes Germ, Toasted Wheat, Oatmeal (coarse) 1 cup macaroni rings Cook pepper and brushing.