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.
Stove/Oven Height. When it comes to height, there are some variations. Average heights for a stove/oven combo are either 37.25 inches or 47 inches, depending on the manufacturer. The most common height of 36 inches accommodate standard counter heights.
Commercial kitchens use the full size, 26 x 18 inch sheet pan. These dimensions are too large for standard size home ovens. Also used frequently is the three quarter 2/3 pan. Its dimensions are suitable for different types of baking.