To make whole wheat flour, the endosperm is combined with the bran and the germ. Bran is made up of the outer layers of the wheat kernel. Bran is used in whole wheat flour. It is also used in breakfast cereals. The germ is the part that will sprout and grow into a new wheat plant if the kernel is planted.
Wheat germ is sold in grocery stores and food markets.
Whole wheat flour also contains wheat germ. To the left of the millstone cover is the tentering screw. This adjusts the distance between the millstones for coarse or fine grind. This keeps tension of the shoe against the damsel. Sitting on the to of the horse is the hopper that supplies grain to the shoe.