Porta, Giambattista della, approximately 1535-1615, Gaywood, Richard, active 1650-1680, engraver, Young, Thomas, active 1658, publisher, Speed, Samuel, -1681, publisher · London : Printed for Thomas Young and Samuel Speed and are to be sold at the three pigeons, and at the angel in St. Paul's Church-yard · leaf 210
. That the ferce of North and South is vigorous in the points* BUt what is more wonderful ? Though the force retreats to the middle of the ftone,yet it doth not fend it felf forth by the middle,but by the extream parts of the ftone,and lies ftill in the middle, as if it were aflcep j but it is… … muft fay. Chap. VII. That by the touching of other ftonesy thofe joints will not change their forces. ANd becaufe I faid that the Load-ftone doth not always hold its forces cqual,but that one ftone i« more powerful in operation then another, for fome are faint and weak;! fhall put the firft…
![An illustration from Io. Bap. Portae Neopolitani de distillatione lib. IX : quibus certa methodo, multipliciq[ue] artificio, penitioribus naturae arcanis detectis, cuius libet mixti in propria elementa resolutio, perfectè docetur (1608)](https://img.insideoutlibrary.com/img/200/ia-iobapportaeneopo00port-43-32.webp)
