- 3 Mental retardation
- 2 Mental states
- 2 Mentally handicapped children
- 4 Mentally ill persons
- 9 Menus
- 1 Menzies, Mr.
- 1 Mercantile Loan Association
- 7 Mercantile buildings
- 1 Mercantile Hotel
- 9 Mercantile Library of Philadelphia
- 4 Mercer County, New Jersey
- 1 Mercer Home For Aged Ministers
- 7 Merchandise displays
- 1 Merchant & Co. Metals, Copper, Tin Plates, Brass (Firm)
- 1 Merchant Marine Act of 1920
- 1 Merchant vessels
- 119 Merchants
- 1 Merchants Building
- 25 Merchants' Exchange Building
- 10 Merchants' exchanges
- 2 Merchants Hotel
- 1 Merchants National Bank
- 1 Merchants Trust Co.
- 1 Merchantville, New Jersey
- 5 Mercury (Roman deity)
- 2 Mercury (Sculpture)
- 3 Meredith, George, 1828-1909
- 2 Meriden Britannia Co.
- 1 Meriden Silver Plate Co.
- 4 Merion Hall Driveway
- 9 Merion Station, Pennsylvania
- 36 Merion, Pennsylvania
- 3 Mermaid Hotel
- 1 Mermaid Lane
- 1 Mermaid Lane
- 9 Mermaids
- 3 Merrick & Sons Southwark Foundry
- 1 Merrick Street
- 1 Merritt, Wesley, 1834 - 1910
- 1 Merry-go-rounds
