Explanation of Table I.- Table I: Experimentally Useful Transitions for the ICP.- Explanation of Table II.- Table II: (a) Transitions Occurring within ±1 Angstrom and (b) Major Transitions within ±5 Angstroms of the Analytical Line.- Explanation of Table III.- Table III: Lines below 2000 Angstroms.- Explanation of Table IV.- Table IV: Argon Lines.