[_So mark'd on orreries_. l. 505. The first orrery was constructed by a
Mr. Rowley, a mathematician born at Lichfield; and so named from his
patron the Earl of Orrery. Johnson's Dictionary.]


"Where, girt with clouds, the rifted mountain yawns,
And chills with length of shade the gelid lawns,
Climb the rude steeps, the granite-cliffs surround,
Pierce with steel points, with wooden wedges wound;
525 Break into clays the soft volcanic slaggs,
Or melt with acid airs the marble craggs;
Crown the green summits with adventurous flocks,
And charm with novel flowers the wondering rocks.
--So when proud Rome the Afric Warrior braved,
530 And high on Alps his crimson banner waved;
While rocks on rocks their beetling brows oppose
With piny forests, and unfathomed snows;
Onward he march'd, to Latium's velvet ground
With fires and acids burst the obdurate bound,
535 Wide o'er her weeping vales destruction hurl'd,
And shook the rising empire of the world.


[_The granite-cliffs._ l. 523. On long exposure to air the granites or
porphories of this country exhibit a ferrugenous crust, the iron being
calcined by the air first becomes visible, and is then washed away from
the external surface, which becomes white or grey, and thus in time
seems to decompose. The marbles seem to decompose by loosing their
carbonic acid, as the outside, which has been long exposed to the air,
does not seem to effervesce so hastily with acids as the parts more