M
- Machinery and Instruments (11)
- Machinery and Tools (31)
- magazine advertisement (2)
- Magazines and Newspapers (21)
- Maine--Augusta (1)
- Maine--Hallowell (1)
- Maine--Portland (2)
- Maryland--Baltimore county (1)
- Maryland--Baltimore (52)
- Maryland--Boonsboro (1)
- Maryland--Frederick (1)
- Maryland--Hagerstown (6)
- Maryland--Oxford (1)
- Maryland--Prince George's County (1)
- Maryland--Westminster (1)
- Maryland--Williamsport (1)
- Massachusetts--Boston (31)
- Massachusetts--Buxton (1)
- Massachusetts--Cambridge (1)
- Massachusetts--Canton (2)
- Massachusetts--Chicopee Falls (1)
- Massachusetts--Concord (1)
- Massachusetts--East Somerville (1)
- Massachusetts--Fitchburg (1)
- Massachusetts--Lowell (10)
- Massachusetts--Springfield (3)
- Massachusetts--unknown (1)
- Massachusetts--West Millbury (1)
- Meat/Fish/Poultry (5)
- Medical (29)
- Mercantile Business (12)
- Michigan--Battle Creek (1)
- Michigan--Cadillac (1)
- Michigan--Detroit (7)
- Michigan--Holly (1)
- Michigan--Kalamazoo (1)
- Military-- (103)
- Military (103)
- Minnesota--Minneapolis (1)
- Minnesota--St. Paul (1)
- Misc. Recipes and Patent Medicines (10)
- misc. (91)
- Miscellaneous - Detective Agency (1)
- Miscellaneous - Entertaining (1)
- Miscellaneous - Laundry (1)
- Miscellaneous - Pharmacy (2)
- Miscellaneous (15)
- Mississippi--Columbus (1)
- Mississippi--Gulfport (1)
- Mississippi--Tippah County (1)
- Mississippi--unknown (1)
- Missouri--Kansas City (3)
- Missouri--Marshall (1)
- Missouri--St. Louis (24)
- Missouri--unknown (1)
- Missouri--West Plains (1)
- Multiple Ads (9)
- Multiple Products (3)
- Music and Pianos (8)
- Music, Concerts (3)
- Musical Instruments (18)