"Some seed of light and heat, however crass
The enclosure, yet avails not to discharge
Its radiant birth before there come to pass
"Some push external,—strong to set at large
Those dormant fire-seeds; whirl them in a trice
Through heaven, and light up earth from marge to marge:
"Since force by motion makes—what erst was ice—
Crash into fervency and so expire,
Because some Djinn has hit on a device