TY - JOUR T1 - The Effect of Pressure upon Arc Spectra. No. 5. Nickel, $\lambda $ 3450 to $\lambda $ 5500, Including an Account of the Rate of Displacement with Wave-Length, of the Relation between the Pressure and the Displacement, of the Influence of the Density of Material and of the Intensity of the Spectrum Lines upon the Displacement, and of the Resolution of the Nickel Spectrum into Groups of Lines JF - Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Math. or Phys. Character (1896-1934) VL - 215 SP - 205 EP - 252 PY - 1915/01/01/ UR - http://dx.doi.org/10.1098/rsta.1915.0008 M3 - doi:10.1098/rsta.1915.0008 AU - Duffield, W. ER -