Subject	Number of Items
Main Reading Room	5
Main Stairway	2
Maps	5
Matthews, C. J.	1
Mayors	4
McCambridge Co. Plumbing Fixtures.	1
Mechanical drawings	2
Mercantile Library of Philadelphia	1
Metal furniture	1
Miramar	1
Model ships	1
Modeling (forming)	3
Models (representations)	2
Monuments & memorials	1
Moore, J. Hampton (Joseph Hampton), 1864-1950.	1
Motto	1
Moving & storage trade	2
Municipal City Planning Exhibition	1
Music Room	3
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