It has, however, been found iwanting in some important features, and others have needed expansion 50 as to bring the work up to modern requirements. A further Edition having been called for, has afforded the opportunity of having these deficiencies remedied by the addition Of matters which will put the book in line with the latest improvements in this section Of the Mechanical Arts. Chapter I on pre paratory processes, has been entirely rewritten and enlarged. My Obligations are many to Mr. H. Nisbet, Weaving and Designing Master here, who has kindly carried out this work. Some chapters have had new and important features added, and many drawings are included for the first time, either as new illustrations.