INTERCALARY. Any period of time interpolated in the calendar for the purpose of accommodating the mode of reckoning with the course of the sun.
INTEREST POLICY. See [Policy].
INTERLOPER. A smuggling or forced trade vessel. As a nautical phrase it was generally applied to the "letters of marque" on the coasts of South America, or a cruiser off her admiral's limits (poaching).
INTERMEDIATE SHAFT. In a steamer, is the iron crank common to both engines.
INTERNAL CONTACT. This, in a transit of Mercury or Venus across the solar disc, occurs when the planet is just within the sun's margin.
INTERNAL PLANKING. This is termed ceiling of the ship.
INTERNAL SAFETY-VALVE. A valve opening from the outside of a steamer's boiler, in order to allow air to enter the boiler when the pressure becomes too weak within.
INTERROGATORIES. The practice in the prize court is, on the breaking out of a war, to prepare standing commissions for the examination of witnesses, to which certain interrogatories are annexed; to these the examination is confined. Private interrogatories are inadmissible as evidence.
INTERSECTION. The point in which one line crosses another.
INTERTROPICAL. The space included between the tropics on each side of the equator, making a zone of nearly 47°.