[1686] “Oportet quod medicina simplex experiatur in duabus contrariis aegritudinibus diversis, sicut scamonea in quotidiana et tertiana, ipsa enim curat quotidianam ex sua complexione, tertianam ex proprietate sua, tamen non sequitur, scamonea curat tertianam, ergo est frigida; sed sequitur, ipsa ex sua complexione curat quotidianam, ergo est calida.”
The use of the word “proprietas” for occult virtue is found also in Arnald of Villanova and other medieval writers.
[1687] John’s third, fourth and fifth conditions do not exactly correspond to any of Peter’s, but are contained in the following quotation from Galen (simpl. med. I, 2) in the Concordances. “Ad hoc ut res recte experiatur, tria requiruntur: 1m est ut experiatur in re ad quam comparatur, ut helleborus in coturnice non in homine; 2m requiritur ut distinguamus inter opus quod facit res per se et quod facit per accidens; 3m oportet cavere ne complexio actualis obnubilet potentialem et de omnibus his exempla ponit.”
[1688] “experimentum in corpore humano et primo in temperato, postea in lapso, et postea in aegro.” These last two conditions correspond to Peter’s last two and are also duplicated in John’s Concordances from Galen: “Si videris 5 vel 6 homines qualibet medicina mobiles, experimento solo non potuisti certiorare ilia medicina omnes homines posse moveri.... Oportet cum res experitur ut primo experiatur in corpore temperato et postea in intemperate.”
[1689] See the foregoing footnotes and Pagel’s text (1894), pp. 102-4.
[1690] Expositio in Antidotarium Nicolai, fol. 268, “... et hoc patet per experimentum accipiatur virga coryli recens et scindatur per medium medullae et ponatur frustum unum in manu una et aliud in alia manu, adinvicem coniungentur et hoc est quia unam alteri natum est conjungi naturaliter quia ex eis fiebat naturaliter unum conjunctum, et ideo unum natum est alteri conjungi excitatum per virtutem alterius. Et per illud faciunt vetulae carmen suum in matrimonium: dicunt enim quod quando aliquis desponsat aliquam, quod illae virgae coryli si conjungantur matrimonium erit ad bonum, si non, non: sed dicunt carmen aliquid operari ad hoc quod nisi dicerent, conjungerentur tarnen sive ad bonum sive ad malum.”
[1691] HL XXI, 263-5.
APPENDIX I
SOME MANUSCRIPTS OF THE THESAURUS PAUPERUM
I have examined the following MSS of the work in the collections in the British Museum. As usual, the dating of the MSS is not my own, but either that given in the catalogues of the collections or in the MSS themselves.