  In the scientific literature the equation $Q=\{Q\}[Q]$ is frequently quoted,
where $Q$ denotes a quantity, $\{Q\}$ a numerical value, and $[Q]$ a unit.
During the last years some experts claimed, that this equation is due to James
Clerk Maxwell. This is obvious, they say, from the opening sentences at the
beginning of Maxwell's book "A Treatise on Electricity and Magnetism". In this
paper it will be shown that this view cannot be justified.
