Stationary steam engines; especially as adapted to electric lighting purposes (1884)
Thurston, Robert Henry, 1839-1903 · New York, J. Wiley & sons · leaf 213
dered. These instruments, being absolutely automatic, give testimony that isnever doubted, and do their work with perfect certainty and invariableexactness. They never forget and never make a mistake. A pointer anddial give the same indications as are seen on the old form of indicatinggauges, and… … This Instrument gives records simultaneously of the steam or waterpressure and of the speed of engines or machinery. Both are recordedupon the same chart, continuously and accurately. The width of the loops in above tracing (lower line) indicate the lengthof time the speed was interrupted—as of a…
Steam-engines
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