![Specimen of devitrification of glass, illustrating the formation and colouration of slags](https://coimages.sciencemuseumgroup.org.uk/399/645/large_smg00030992.jpg)
Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimens of devitrification of glass, illustrating the formation and colouration of slags, all communicated by W.D. Herman, St. Anns Glassworks, St. Helens, Lancashire, 1872-3
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimens of devitrification of glass, illustrating the formation and colouration of slags
Specimen, Specimen of devitrification of glass, illustrating the formation and colouration of slags