This is a series of articles by W. H. Davies of Liverpool published in The English Mechanic and World of Science
in July and August, 1878. They can mostly be downloaded from Google Books
but part of part 6 is missing. The vertically strung English sticker action upright piano Mr. Davies describes was old fashioned at the time and many piano tuners won't service them now, and the services and patterns he offers as well as the parts he recommends are no longer available so some options might be researched when you follow his directions. I edited and broke it up a little, and reproduced some of the illustrations as vector drawings. The engraving is of a cabinet upright taken from A Day at a Pianoforte Factory
in Days at the Factories: Or, the Manufacturing Industry of Great Britain
by George Dodd, from 1843.
The first part describes making the wooden frame or back of the piano.