Thomas A. Edison Papers. Electric Generator. In the fall of 1878, after experiments indicated that existing arc light generators were inefficient for incandescent lighting Edison and his chief assistants, Charles Batchelor and Francis Upton, investigated generator design and the principles of electromagnetism.
Size. The standard width of a residential range is 30 inches, but higher-end ranges can extend to 36 inches and beyond. The oven compartment on a typical range is 5 cubic feet, compared to just over 3 cubic feet in a typical wall oven.
2. The pan's size. Before you invest in a quality roaster, determine how big a pan your oven can accommodate. Roasters need 1-2 inches of air space on all sides. If your oven can handle a pan about 16 inches long and 13 inches wide, this is the size to consider. It will accommodate turkeys as well as chickens, which roast best when taking up only about half the pan's floor space. 3. The grip of the handles