The Use of SI Units

This paper, sponsored by the Publications Committee, is designed to serve as a guide to SI units and the use of the SI system.  It owes its inception to Mr R Murphy of the Department of Industrial Chemistry, The Queen’s University, Belfast.  It was his \notes on the Use of SI Units  submitted to the Committee  which lead to the decision that a more general paper on SI units should be produced.  A large part of the information regarding SI equivalents for cgs (centimetre-gram-second) and ft-ib-sec (foot-pound-second) units is taken from his paper.