Spiritus igitur egrediens ex corpora, quod ab humore aut succo aqueo concreverat, corpus attrahendum attingit, attactum attrahenti unitur; corpus peculiari effluviorum radio continguum, unum effecit ex duobus: unita confluunt in conjunctissimam convenientiam, quae attractio vulgo dicitur. Quae unitas iuxta Pythagorae opinionem rerum omnium principium est, per cuius participationem unaquaeque res una dicitur. Quoniam enim nullo actio a materia potest nisi per contactum, electrica haec non videntur tangere, sed ut necesse erat demittitur aliquid ab uno ad aliud, quod proxime tangat, et eius incitationis principium sit. Corpora omnia uniuntur & quasi ferruminantur quodammodo humore ... Electrica vero effi via peculiaria, quae humoris fusi subtilissima sunt materia, corpuscula allectant. Aer (commune effluvium telluris) & partes disjunctis unit, & tellus mediante aere ad se revocat corpora; aliter quae in superioribus locis essent corpora, terram non ita avide appelerent. Electrica effluvia ab aere multum differunt, & u aer telluris effluvium est, ita electrica suahabent effluvia & propria; peculiaribus effluviis suus cuique; est singularis ad unitatem ductus, motus ad principium, fontem, & corpus effluvia emittens. A similar hypothesis will reappear in his explanation of magnetic attraction. [119] M: pp. 91, 92: "This unity is, according to Pythagoras, the principle, through participation, in which a thing is said to be one" (see footnotes 30 and 122). [120] "Sense" is probably too strong a term, and yet the change following contact is difficult to describe in Gilbert's phraseology without some such subjective term. See Gilbert's argument on the soul and organs of a loadstone, M: pp. 309-313. [121] M: pp. 112, 113. [122] Gilbert, _De magnete_, London, 1600, bk. 2, ch. 2, pp. 56-57. Following the tradition of the medieval schoolmen Gilbert started his examination of the nature of the loadstone by pointing out the different kinds of motion due to a magnet. The five kinds (other than up and down) are:[123] (1) coitio (vulgo attractio, dicta) ad unitatem magneticam incitatio. (2) directio in polos telluris, et telluris in mundi destinatos terminos verticitas et consistentia. (3) variatio, a meridiano deflexio, quem motum nos depravatum dicimus. (4) declinatio, infra horizontem poli magnetici descensus. (5) motus circularis, seu revolutio. Of the five he initially listed, three are not basic ones. Variation and declination he later explained as due to irregularities of the surface of the earth, while direction or verticity is the ordering motion that precedes coition.[124] This leaves only coition and revolution as the basic motions. How these followed from "the congregant nature of the loadstone can be seen when the effusion of forms has been considered."