Place
- Manatee1
- Mason1
- Massachusetts1
- McKinely twp., ca. 2 mi. E. of Levering.1
- Mcintosh1
- Mecosta1
- Mississippi1
- Missouri1
- Mitchell Lake, Sta. No. 1.1
- Mobile1
- Mono1
- Monroe1
- Montcalm1
- Montgomery1
- Morris1
- Murray1
- Muskegon River Basin, south of Muskegon River.1
- N of Baldwin.1
- N. side of Hickory Nut Gorge, on US Rt. 74, 2 mi. w of Bat Cave.1
- Napa1