Crucible and lid
1968
"Vitreosil" basin in translucent fused silica
1968
Translucent "Vitreosil" fused silica furnace tube
1968
Slotted jig, in fused silica, 1968
1968
Old gas globe in "Vitreosil" pure fused silica
Racal Former, in fused silica, 1968
1968
Spectrosil Crucible, in fused silica, 1968
1968
Flash tube, in fused silica, 1968
1968
Bodenstein Gauge
1968
Spring, in fused silica
1968