The Relative Proportions of the Steam Engine: A Course of Lectures is a book written by William Dennis Marks and published in 1878. The book is a comprehensive guide to the design and construction of steam engines, with a focus on the relative proportions of the various components. Marks presents a series of lectures on the subject, covering topics such as the cylinder, the piston, the connecting rod, and the crankshaft. He also discusses the importance of proper proportions in achieving maximum efficiency and power output, and provides practical advice on how to achieve these proportions in practice. The book is aimed at engineers, mechanics, and anyone interested in the science of steam engines. It is a valuable resource for anyone looking to understand the principles of steam engine design and construction.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.