Twenty Years with the Indicator, being a practical text-book for the engineer or the student, with no complex formulae (two volumes bound in one)

See photos for condition details. Hardcover, beveled red cloth boards with gilt text on front and spine. Exterior shows some spotting and soiling along with edge and corner bumps/wear. The rear board shows spotting as well as a scuff spot near the center. Internal binding is good in text pages are tight. No signatures or bookplates, no library markings, no handwriting or underlining, no remainder marks. Pages are toned due to age but are clean, except for the end pages which have a few light smudge marks. Title page states twentieth thousand.