P.9480	12461	[Allegheny Avenue railroad bridge, Philadelphia]	Nitrate; Jennings print	26-Dec-15
P.9480	12463	[Allegheny Avenue railroad bridge, Philadelphia]	Nitrate; Jennings print	26-Dec-15
P.9480	12462	[Allegheny Avenue railroad bridge, Philadelphia]	Nitrate; Jennings print	26-Dec-15
P.9480	1085	[Allegheny River Bridge, Pittsburgh, Pa.]	glass plate negative
P.9480	H-129A	[Benjamin Franklin Bridge approach, Camden, N.J.]	safety negative; modern print	March 23-26, 1926
P.9480	H-129	[Benjamin Franklin Bridge approach, Camden, N.J.]	; 2 modern prints	23-Mar-26
P.9479	213647	[Benjamin Franklin Bridge over the Delaware River]	modern print
P.9479	121A	[Benjamin Franklin Bridge over the Delaware River]	Safety negative, Jennings print
P.9479	2673	[Benjamin Franklin Bridge plaza garage in Camden, N.J.]	Safety negative; Jennings Print
P.9480	H-121B	[Benjamin Franklin Bridge, Philadelphia]	Nitrate
P.9480	119	[Benjamin Franklin Bridge, Philadelphia]	Safety negative	c. 1926
P.9480	60	[Big Viaduct Bridge over the Little Conemaugh River]	glass plate negative	1886
P.9479	C-60	[Camaguey Railroad Bridge, Cuba]	Jennings print	1930
P.9480	6913	[Charles Street Bridge, Baltimore Station of the Pennsylvania Railroad, Baltimore, Md.]	glass plate negative; digital image
P.9480	215030	[Christiana Bridge]	Nitrate
P.9480	8308	[Connecting Railroad Bridge over the Schuylkill River]	glass plate negative	September 14, 1897
P.9480	8310	[Connecting Railroad Bridge over the Schuylkill River]	glass plate negative	October 17, 1897
P.9480	7314	[Connecting Rilaorad Birdge at Girard Avenue, Philadelphia]	Glass negative; modern print	29-Aug-12
P.9480	7193	[Girard Avenue Bridge over the Schuylkill River, Philadelphia]	glass plate negative; modern print	26-Jul-12
P.9480	7194	[Girard Avenue Bridge over the Schuylkill River, Philadelphia]	glass plate negative; modern print	26-Jul-12
P.9480	7196	[Girard Avenue Bridge over the Schuylkill River, Philadelphia]	Glass negative; modern print	26-Jul-12
P.9480	7361	[Grays Ferry Bridge monument]	glass plate negative
P.9480	11758	[Gywnne Falls Bridge]	Glass negative - broken	27-Apr-15
P.9480	J-45	[Little Comemaugh Bridge]	Nitrate
P.9480	J-44	[Little Conemaugh Bridge]	Nitrate, digital image
P.9480	214992	[Manayunk Railroad Bridge]	Glass negative; modern print
P.9480	11985	[Manayunk Railroad Bridge]	Nitrate	8-Jul-15
P.9480	11983	[Manayunk Railroad Bridge]	Nitrate	8-Jul-15
P.9480	11982	[Manayunk Railroad Bridge]	Nitrate	8-Jul-15
P.9480	11984	[Manayunk Railroad Bridge]	Nitrate	8-Jul-15
P.9479	MJ-24	[Market Street Bridge over the Schuylkill River, copy photography]	Safety negative; modern print
P.9480	8802	[North Philadelphia Bridge over Broad Street, Philadelphia]	glass plate negative; digital image	5-Dec-13
P.9480	214798	[Old Camel Back Bridge, Harrisburg, Pa.]	glass plate negative
P.9480	215822	[Old standard overhead bridge, unidentified location]	glass plate negative; digital image
P.9480	137	[Pennsylvania Railroad bridge over the Allegheny River at Kiskiminetas Junction]	Glass negative - broken
P.9479	10347	[Pennsylvania Railroad bridge over the Wissahickon and Lincoln Drive, Philadelphia]	3 modern prints
P.9480	1128	[Pennsylvania Railroad Company bridges over the Schuylkill River]	Safety negative
P.9480	1128A	[Pennsylvania Railroad Company bridges over the Schuylkill River]	Safety negative
P.9480	12467	[Pennsylvania Railroad Phoenixville Bridge]	Nitrate	January 3, 1916 ?
P.9480	6576	[Perkiomen Bridge]	glass plate negative
P.9480	7945	[Perryville Bridge]	glass plate negative
P.9480	12466 or 12521?	[Phoenixville Railroad Bridge]	Nitrate	1916
P.9480	12045	[Railroad bridge over Front Street, Harrisburg, Pa.]	Nitrate	28-Jul-15
P.9480	12052	[Railroad bridge over Front Street, Harrisburg, Pa.]	Nitrate	28-Jul-15
P.9480	12046	[Railroad bridge over Front Street, Harrisburg, Pa.]	Nitrate	28-Jul-15
P.9480	1026	[Raritan River Bridge, New Brunswick, Nwe Jersey]	Safety negative
P.9480	1043	[Rockville Bridge over the Susquehanna River, Harrisburg, Pa.]	glass plate negative, digital image
P.9480	13810	[Rockville Bridge over the Susquehanna River, Harrisburg, Pa.]	glass plate negative, digital image	13-Apr-17
P.9480	1023	[Rockville Bridge over the Susquehanna River, Harrisburg, Pa.]	Safety negative
P.9480	1024	[Trenton Railroad Bridge, Trenton, N.J.]	Nitrate
P.9479	10348	[Wissahickon Creek and Lincoln Drive, Philadelphia]	Safety negative; 4 modern prints
P.9480	J-65	[Little Conemaugh Bridge.]	Nitrate
P.9480	J-64	[Penna. R.R. Co. Little Conemaugh Bridge.]	Nitrate	June, 1889
P.9479	1116	[Hell Gate railroad bridge, New York?]	?; modern print	7-Jan-28