The Jinn

To call a Jinn the only thing
One needed was a magic ring.
You rubbed the ring and forth there came
A monster born of smoke and flame,
A thing of Vapor, Fume and Glare
Ready to waft you anywhere.
The magic Jinns of yesterday
The wand of Science now obey.
You ring, and lo! with rush and roar
The panting monster's at the door,
A thing of Vapor, Fume and Glare
Ready to take you anywhere.
What's in a name? What choice between
The Giants, Jinn and Gasolene?