The method of creating vaults...

SCIENTIFIC AMERICAN SUPPLEMENT, New York, NY, December 22, 1894  This 16 page issue is in nice condition and contains illustrations, most of which pertain to the latest inventions of the day, with accompanying text including: "Recruiting for the Chinese Army", "French Methods of Electric Light Installation", "The Bank Vault Industry - Hardening the Plates in Salt Water", and "Three Hundred and Twenty Horse Power Gas Motor - Single Cylinder". The cover of the issue features "The Late Dr. Oliver Wendell Holmes". This is complete in 16 pages.