""An Essay On The Use Of The Spirit Level: As Applied To Engineering And Other Purposes"" is a book written by Thomas Oswald Blackett in 1838. The book discusses the use and importance of the spirit level in engineering and other fields. It provides a detailed explanation of the principles behind the spirit level and its various applications, including the measurement of horizontal and vertical surfaces, the construction of buildings, and the laying of railways. The book also includes practical instructions on how to use a spirit level and how to calibrate it for accurate readings. Overall, this book is a valuable resource for anyone interested in the history and use of the spirit level in engineering and other areas of study.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.