Five O'clock
Doesn't end the workday.
Virgo's nimble watchmaker mind ticks on.
478.5 is the wavelength of blue.
Corundum is the reason for sapphire.
Virgo,
Earth-bound builder of planes,
Land-locked draftsman of ships.
Mercury's many-eyed measurer
Explores an atom with room to spare,
Can survive within a fraction.
A circle is perfect,
But the world isn't round.
Virgo can prove it.
