Calling Sackville Street the heart of the metropolis is a metaphor, but coming where it does in the text—just before clanking tramcars, creaking mailcars, thudding barrels, thumping printingpresses—the phrase insinuates a near equivalence between human bodies of flesh and blood and civic bodies of wood, steel, and electricity.

John Hunt 2013

Mechanical heart—colored, by toxinbaby. Source:

State-of-the-art steam engine-driven printing press at the Omaha World-Herald, ca. 1900, capable of printing and assembling 24 pages at one time. It was converted to electric power in 1905. Source: