LINGO LIBRARY · 44771Perpetual Motion✳Dircks, Henry · Verance, PercyENB2 · EstimatedPerpetual MotionDircks, Henry · Verance, Percy
LINGO LIBRARY · 43841Scientific Studies; or, Practical, in Contrast with Chimerical Pursuits✳Dircks, HenryENB2 · EstimatedScientific Studies; or, Practical, in Contrast with Chimerical PursuitsDircks, Henry
LINGO LIBRARY · 51903The Life, Times, and Scientific Labours of the Second Marquis of Worcester To which is added a reprint of his Century of Inventions, 1663, with a Commentary thereon.✳Dircks, HenryENB2 · EstimatedThe Life, Times, and Scientific Labours of the Second Marquis of Worcester To which is added a reprint of his Century of Inventions, 1663, with a Commentary thereon.Dircks, Henry
