- Dr. Kane proves that we have at Arigna an inexhaustible supply of the richest iron ore, with coals to smelt it, lime to flux it, and infusible sand- stone and fire- clay to make furnaces of on the spot. - "Thomas Davis, Selections from his Prose and Poetry", Thomas Davis Commentator: T. W. Rolleston.
- His notes include the use of powdered silicon mixed with lime or other very infusible non- conductors or semi- conductors. - "Edison, His Life and Inventions", Frank Lewis Dyer and Thomas Commerford Martin.
- They also supply " hard" or " combustion" glass, but this is only used for special purposes, as it is too infusible for convenient working in the ordinary blowpipe flame. - "A Handbook of Laboratory Glass-Blowing", Bernard D. Bolas.