Quarto contemporary calf ruled and with corner ornaments (worn to all corners, top cover re-attached lower cover held by cords). Frontis portrait + Titlepage +[2]pp dedication +xvi +[18]pp contents & errata +731pp (recte 723pp since pp17-23 are omitted but catchwords & signatures are correct) +[1]p blank. Contents generally in good clean and crisp condition but damp has damaged outer margins of preliminaries and first dozen or so leaves of text. This affects margins and some side notes only except for frontis & titlepage which have margins repaired. Library stamp "Bib.Scriptorum, S.J. Londinii" on back of frontis with shelf mark to upper corner, titlepage with old owner's name Ed. Southcott on blank area. Cancellandum leaves at 2F4 & 2H2 with original stubs as required. *The first 4 editions of this Latin exposition & commentary on Descartes appeared in London between 1672 (1st) and this 1680 4th edition with an increased number of illustrations. In ten books starting with De Logica, II Theologia Naturalis, III Angels & Demons, IV & V Physics & Astronomy, VI Earth, Fire, Water Metals & Meteors, VII Living Things, VIII Man with much on eyes, vision & anatomy, IX & X the Passions & character of humans (WING 957).