Berlin Laboratory Porcelain "H" brand slab 12.5x10.5cm
pre-1938
Square ruby slab, 5.625" x 5.5"
Glass slab possibly used by Joseph Lister in his microbiology experiments, Europe, 1870-1912
1870-1912
Two marble slabs for adhesion
1700-1799
Newallite Slab Brand "C", wrapped with asbestos paper
Iron slab, part of x-ray installation, 1905-1909.
1905-1909