Triple Expansion Engines and Boilers was written by marine engineer A. Ritchie Leask as a practical guide to the machinery that powered many late-19th-century steamships. A cataloged second edition was published in 1894 by the Tower Publishing Company.

Triple-expansion engines increased efficiency by passing steam successively through high-, intermediate-, and low-pressure cylinders. Each stage extracted additional energy from the expanding steam, reducing fuel consumption and extending the operating range of steam-powered vessels.

Leask’s book explains the construction, operation, and management of triple-expansion engines and their boilers. It would have served as a valuable reference for marine engineers responsible for maintaining reliable machinery during long voyages.

This volume represents an important period in marine engineering, when triple-expansion machinery helped make steam transportation more economical and dependable.