Q. Elasticity in hot glass

Attached is a bibliography that may be of help. Also, you mention that you're interested in the development of the pressing of glass lenses. We have little on eyeglass lenses and you would be best off to visit the antiquespectacles.com website and use the "contact us" link at the bottom.

While we do try and collect everything on glass, we do focus on the art and history of glass and glassmaking and often do not have technical materials. For technical questions you may contact one of the following organizations:

 The Scholes Library at Alfred University, New York State College of Ceramics. They have a substantial collection of technical information about glass. Their reference desk number is: (607) 871-2951. Alfred’s library catalog is available for searching on the web: http://scholes.alfred.edu.

 The Glass Division of the American Ceramic Society (Columbus, Ohio) Website: http://www.acers.org/

 The American Ceramic Society, P.O. Box 6136, Westerville, Ohio 43086-6136 ; Phone: (614) 890-4700 ; email: info@acers.org

 The Society of Glass Technology in Sheffield, UK: Website: http://www.societyofglasstechnology.org.uk/; Don Valley House, Savile Street East, Sheffield S4 7UQ, UK ; e-mail: info@sgt.org

 Also, when searching for articles, it is best to use our Glass Article Index. You can do so from the link here: 

http://www.cmog.org/research/library/catalogs