Nothing wrong with these shelves. Shelves like these may be built in a well-ventilated cellar, cave, or closet where it is cool, but not cold enough to freeze, and where there is no strong light. They are wide enough, they are built of strong boards, and they are braced with sturdy supports. One hundred feet of twelve-inch shelving will hold five hundred jars. Notice the orderly arrangement of jars. All foods of one kind are together. Sourced from the Library of Congress.