if you have no idea what a prism glass tile is read this article to cover the basics.
http://files.umwblogs.org/blogs.dir/7608/files/glass/prismatic.pdf
I would like to eventually post pictures of all different prism and light diffusing tiles from the same period. Luxfer has become somewhat of a "catch all" name for these tiles, but many different companies had their own designs.
-Go here- http://www.glassian.org for an incredible wealth of glass information. Copies of manufactures catalogs, ads, pictures, patent drawings, prism tiles, vault lights, insulators, and more.
-Go here for an article on restoration -http://www.nps.gov/tps/.../Tech-Notes-Glass01.pdf Other reading
here-http://www.rosinpreservation.com/projects/j-w-crancer-building-528-delaware-street/
here-http://www.appliedarts.net/thestockton/storefronts.htm
here- http://www.coppercountryexplorer.com/2010/05/the-shelden-dee-block/
here-http://www.nps.gov/tps/how-to-preserve/tech-notes/Tech-Notes-Glass02.pdf
here-http://www.coppercountryexplorer.com/2012/04/from-the-ashes-p8-the-therrien-building/
here- https://www.illinois.gov/ihpa/Preserve/Documents/Storefronts-Shopfronts-Facades.pdf
Read the history section of Luxfer Cylinders for the companies "glass roots". here- http://www.luxfercylinders.com/about-luxfer
Special thanks to Amy Pasco, Sarah Boettcher, and Patsy Lavender for providing pictures of individual tiles and window shots.
Vault lights http://islandnet.com/~ringuett/prism/report/prisms.htm
and -http://allianceforpioneersquare.org/wp/wp-content/uploads/2011/12/Seattle-Prism-Light-Reconnaissance-Study.pdf
- http://sidewalkglass.weebly.com/