Fused silica high temperature crucible
1851-1900
Fused silica rod, 1968
1968
Fused silica high temperature crucible
1851-1900
Fused Silica Prism by Adam Hilger Ltd.
1900-1905
Fused Silica Prism (compound - 4 segments) by Adam Hilger Ltd.
1900-1905
Platinum melted with silica
before 1889
Silica pipe on stand, (?) English, 1851-1900
1851-1900
Silica pipe on stand, English (?), 1851-1900
1851-1900