Ben,
     You might find the Parks Canada Glass Glossary helpful in your analysis.
The reference is:

Olive Jones, Catherine Sullivan et al
     1989 The Parks Canada Glass Glossary for the descriptions of
container, tablewares, flat glass and closures.  National              Historic
Park Service,  Canadian Parks Service,  Environment               Canada.

     This is available from the Canadian Government  Publishing Center, Supply
and Services, Hull, Quebec,  K1A  0S9.  The price was $14.70 , but it may have
gone up.

                         George L. Miller