penstock

Penstock, pen′stok, n. a trough conveying water to a water-wheel.

Adjoining the engine-well are the grating tank and penstock chamber, and with these the principal main sewer communicates.

At the gate is placed a vertical iron tube called a penstock, 7½ feet in diameter and 160 feet deep.

Each turbine in a penstock represents the power of 5,000 horses, and there are now ten or more employed.

Patrick is with him, his devoted servant, and Miss Penstock has gone to keep house for them.