from The Century Dictionary.
- noun A tube leading upward from the stoke-hole of a ship to the deck, through which the ashes are lifted. The shoot is also utilized as a ventilating shaft.
Sorry, no etymologies found.
While the porpoise was very close to the ship and listening hard the ash-shoot was emptied almost on his head, which scared him so badly that he dived deep, and did not come up again for a long time.