"Whatman" No.32 filter paper
"Whatman" No.542 filter paper
Filter paper, "J Green" Ashless, 9cm dia, boxed
Filter paper
Filter paper, "J Green" Hand Made, 18cm diameter
"Whatman" No.51 filter paper cones
J H Munktell's No.1F filter paper
"Whatman" No.44 filter paper
"Whatman" No.43 filter paper
Green's 401 filter paper
Whatman Filter Paper
1920-1950
Carton of Filter Papers, 1962-1965
1962-1965
"Whatman" No.54 filter paper
Filter paper, 11.5cm, by Postlip Mills
"Whatman" No.3MM filter paper
"Whatman" No.30 filter paper
Qualitative Filter paper circles
"Whatman" No.44 filter paper
"Whatman" No.4 filter paper
"Whatman" No.42 filter paper
"Whatman" No.544 filter paper
"Whatman" No.42 filter paper
Filter paper
Green's 401 filter paper
Separa AP Grade filter paper
"Whatman" No.31 filter paper
"Whatman" No.54 filter paper
"Whatman" No.4 folded filter paper
"Whatman" No.42 filter paper
Separa AP Grade filter paper
Box of filter paper made by W.&R. Balston Limited
circa 1970
Filter papers
Filter paper
Filter paper packet
1930
"Whatman" No.50 filter paper
"Whatman" filter paper
"Whatman" No.540 filter paper
Packet of conical large chemical filter papers made by Carl Schleicher & Schull
circa 1900
"Whatman" No.40 filter paper
"Whatman" No.5 filter paper
Packet of conical large chemical filter papers made by Carl Schleicher & Schull
circa 1900
Nine packets of small circular filter papers and numerous loose filter papers in non-original box
circa 1900; circa 1900
Filter samples, British, 1996-1999
1996-1999
Box of 'Sterimat' chemical filter papers made by Ford Ltd
circa 1900