Murphy, George, donor, [73]

Museum of Science and Industry, Chicago, donor, [342]-[348]

Muskrat trap, [357]

Muzzle, ox, [156]

Neck yoke, [188]

Needle; see harpoon fork

Neiley, George F., [362], [363], [409]

Nelson, James, [37]

Newbold, Charles, [17], [52]

Newbold plow, [52]