Young, James:  discovers petroleum, 56

Yttria, 85

Zeitung, Cologne:  157;
   extract from, on street-lighting, 158

Zinc, 125, 130, 267

Zirconia, 84, 85

Transcriber’s List of Corrections

LOCATION
         ORIGINAL
                  CORRECTED

Chapter II
         and similiar material
                  and similar material

Chapter XIII
         as a constant level
                  at a constant level

Chapter XIV
         the carbons to distintegrate
                  the carbons to disintegrate

Chapter XV
         John Pechham
                  John Peckham
         coated with an allow
                  coated with an alloy
         with various billiant
                  with various brilliant
         key in depressed
                  key is depressed

Chapter XVI
         has nearly doubled
                  have nearly doubled

Chapter XVII
         this own indifference
                  their own indifference

Chapter XXIII
         Nature’s lighting varied
                  Nature’s lighting varies

Chapter XXIV
         so-called cadelabra
                  so-called candelabra
         possibilties
                  possibilities

READING REFERENCES
         ...Applications an Theatre.”
                  ...Applications au Theatre.”

INDEX
         Photo-micography
                  Photo-micrography
         Siemans
                  Siemens