he laws of Oleron, and the customs of the admiralty,
modified by statute law.

INSTITUTION. An establishment founded partly with a view to instruction;
as the Royal United Service Institution in London.

INSTRUCTIONS. _See_ PRINTED INSTRUCTIONS.

INSTRUMENT. A term of extensive application among tools and weapons; but
it is here introduced as an official conveyance of some right, or the
record of some fact.

INSUFFICIENCY OF A MERCHANTMAN'S CREW. This bars the owner's claim on
the sea-worthy warrant. (_See_ INCOMPETENCY.)

INSURANCE. _See_ MARINE INSURANCE.

INSURED. The party who obtains the policy and pays the premium.

INSURER. The party taking the risk of a policy. (_See_ UNDERWRITERS.)

INTACT. Unhurt; undamaged.

INTENSITY OF LIGHT. The degree of brightness of a planet or comet,
expressed as a number varying with the distance of the body from the sun
and earth.

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 deg.

INTERVAL. In military affairs, the lateral space between works or bodies
of troops, as distinguished from distance, which is the depth or
measurement in a direction from front to rear.

IN THE WIND. The state of a vessel when thrown with her head into the
wind, but not qu