XVIII. On the Photographic Arc Spectrum of Electrolytic Iron, By J. Norman 
Lockyer, C.B., F.R.S. . page 983 
XIX. On the Photographic Arc Spectrum of Iron Meteorites, By J. Norman 
Lockyer, C,B,, F.R,S. . 1023 
XX. Flame Spectra, at High Temperatures ,—Part II. The Spectrum of Metallic 
Manganese, of Alloys of Manganese, and of Compounds contcdning that 
Element, By W. N. Hartley, F,R,S,, Professor of Chemistry, Royal College 
of Science, Dublin . 1029 
XXL Flame Spectra at High Temperatures ,—Part HI. The Sp)ectroscopic Phenomena 
and Thermo-Chemistry of the Bessemer Process, ByW, N. Hartley, F,R,S,, 
Professor of Chemistry, Roycd College of Science, Dublin . 1041 
Index to Part II, 
1093 
