Tube of Medi-Test urine test strips
1970-1980
Plastic strips for thin layer chromatography
1900-1980
Packet of conical large chemical filter papers made by Carl Schleicher & Schull
circa 1900
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