"Paradise (to be) Regained" is an essay written by Henry David Thoreau and published in 1843 in the United States Magazine and Democratic Review.
Thoreau's review includes several lengthy excerpts from Etzler's book that give a good feel for its contents and its bombast.
To a large extent, Thoreau lets the book review itself through these demonstrative excerpts, only occasionally stopping to advance a minor technical quibble against a grandiose technological extrapolation or to experiment with going even further out on Etzler's limb.
We will marshal the clouds and restrain tempests; we will bottle up pestilent exhalations; we will probe for earthquakes, grub them up, and give vent to the dangerous gas; we will disembowel the volcano, and extract its poison, take its seed out."
Emerson himself had been impressed enough by Etzler's technological prescience to worry about whether the vast energy and machinery of the future would make the working class obsolete and endangered.