Promenade Deck. One of the decks of a passenger steamer. Usually more or less open and free from obstructions.
Promissory Note. Written and stamped undertaking to pay a specified sum of money on or before a specified date.
Proof Load. Excessive load put on an item under test. May vary between 10% and 100% more than the load that the item is intended to take.
Proof Strain. Excessive strain put on an item under test. Always exceeds strain that the item is intended to take.
Proof Stress. Value used to indicate strength of metal when it is difficult to determine yield point. Metal is stretched and its elongation under the stated stress is expressed as a percentage, the value of the stress being stated.