All the railroads are single track, and the gauge is 1 meter 20 centimeters, or 3 feet 11 1/4 inches.

Q.You have stated that the steam and vacuum gauges are generally glass tubes, up which mercury is forced by the steam or sucked by the vacuum? A.Vacuum gauges are very often of this construction, but steam gauges more frequently consist of a small iron tube, bent like the letter U, and into which mercury is poured.

In the symbolic alphabet of Freemasonry, therefore, the twenty-four inch gauge is a symbol of time well employed; the common gavel, of the purification of the heart.

I have a sample in my pocket, the gauge of which is only one two-thousandth of an inch, and it is practicable to make it thinner.

This gauge is a compact machine, designed to measure and indicate the quick pressures resulting from gunpowder explosives and the slow pressures of hydraulic force; the same mechanism used in both cases permits the ready testing and examination of gauge under hydraulic pressure, to determine its accuracy, for the more sudden pressure occasioned by the use of gunpowder.

The gauge of the Dom Pedro Segundo Railway is 1.60 meters, or 5 ft. 3 in.