Links:

• National Park Service Preservation Tech Notes:
  • Repair and Reproduction of Prismatic Glass Transoms (PDF)
  • HISTORIC GLASS (PDF)
• Surveys:
  • Walking Over History: Victoria's Historic Sidewalk Prisms
• Restoration:
  • Repair of Sidewalk Vault Lights
  • Historic Preservation Project for Neuhauser Pharmacy
• Forgotten NY:
  • SUBWAYS and trains
  • street scenes (manhole & coal chute covers)
• U.S. Societies
  • The New-York Historical Society [Tice & Jacobs catalog; call number TH2487 .T53 1883]
  • The Society for the Preservation of New York City Manhole Covers (Location has changed several times, and is once more defunct; previously:
    • http://www.nycmanholecovers.org (Internet Archive)
    • http://pearlstreetrevival.typepad.com/nycmanholecovers
    • http://home.earthlink.net/%7Ebeautyunderfoot/
  • The Western Reserve Historical Society [Cuyahoga/Cleveland data]
  • Recent Past Preservation Network
• U.K. Societies and Museums
  • The Building Conservation Directory (online version)
  • The Cuming Museum (Hayward Brothers)
  • Greater London Industrial Archaeology Society, esp June 2002 News
  • Institute of Historic Building Conservation
  • Maldon Archaeological and Historical Group's Underground Maldon [out of print]
  • Scottish Ironwork - "The Scottish Ironwork Foundation is a registered charity which promotes historic architectural ironwork made or found in Scotland."
• Installations:
  • Johnsen and Company Building (1883), Luxfer transoms (archive.org)
• For Sale:
  • NOS 1880s vault lights for sale at Whittemore-Durgin! sold out
• Miscellanous
  • Jeff Burke's prism glass site with many photos, including some quite rare glass
  • Ray Merritt's Sidewalk Glass
  • Lightwells and their variants
  • Sidewalk Basements on the Internet
  • Sidewalk Vault Lights (New York Daily Photo)
  • Titanic · The New Exhibition shows a set of Haywards pavement lights used as deck lights.
  • The recognition of significant historic character and fabric, archaic materials and earlier building systems and technology
  • Your Transoms are Showing, We Hope!!! (archive.org)
  • Oshkosh Down Under [There's got to be good vault light stuff in here]
  • Manhole Covers Etc.
  • Streetscapes/Subway Platforms; Letting the Sun Shine In
  • Sydney Eye: Let there be light
  • Sidewalk Prisms group on Flickr