The power source measured, not described: steam, because this ground has no fall

Row #1 · the explicit power test, run and sized

The test was run as a measurement, and the measurement is negative for water and positive only for steam. The ground first: Terre Coupee Prairie is, in Chapman's own measure, "almost as level as a barn floor" — over four miles across, 3,000 to 4,000 acres of rich, once-marshy flat. The town stands on the hill at the prairie's southeastern extremity; the township's only large water is the Kankakee marsh ground at its south edge, which is level wet ground, not falling water. On such ground there is no mill-race, no dam site and no fall, and the published record for this town names none: neither Chapman's Olive Township chapter nor Howard's carries a race, a dam or a water-power claim for any mill on this ground, and the gazetteer mill listings reached — Fred G. Miller's saw-mill on section 4 in 1880, the New Carlisle Milling Co. in Polk's 1916–17 roll — list the mills by trade and owner, never by water privilege. The contrast that proves the form belongs elsewhere stands in the record of the town's Ohio namesake: New Carlisle, Ohio, sits on Honey Creek, where its proprietor "built a mill" on the stream as early as 1836 — the water-power form, on a running stream, in the other New Carlisle. River and creek towns had falls; this prairie town had none. What remains is the period's other power, and the Indiana record states its reach exactly: David Paul Nord's study of the flour-milling revolution in the Indiana Magazine of History (December 2020) records that by the late nineteenth century dependable steam engines were available "ready to install anywhere in any mill," and that "steam power allowed factories" — mills among them — "to industrialize cities that had no waterpower." A fixed saw-mill or flour mill planted on level prairie in the 1870s–1910s, with no fall to turn a wheel, ran on steam or it did not run; no third period power existed at this size. The finding therefore prints at its true size: power on this ground was steam, established by elimination against the measured ground and by the state milling record — not by a surviving sentence in a town source that words either mill "steam-powered," and no such sentence is claimed here. The modern echo is printed as an echo only: the St. Joseph Energy Center's combined cycle turns a steam turbine as its second stage — steam is still working on this ground, a century and a half on, as the exhaust of gas.

Sources:

1. Miller's saw-mill, section 4; no race, dam or fall named for this ground.
2. Polk & Co., Indiana Gazetteer and Business Directory 1916–17, New Carlisle entry, read whole: New Carlisle Milling Co. listed by trade, with no water-power claim.
3. David Paul Nord, "The Flour-Milling Revolution in America, 1820–1920: The Indiana Experience," Indiana Magazine of History 116 (December 2020): steam engines installable anywhere; steam powering industrialization in places with no waterpower.
4. Century History of Springfield and Clark County, Ohio (Rockel, ed., 1908), New Carlisle, Ohio entry: the mill on Honey Creek, 1836 — the water-power form in the namesake town, printed as contrast, not as this town's record.
5. This build's land file: the Kankakee marsh at the township's south edge — level wet ground, no fall.