FOOTNOTES:
[67] Aimoini Hist. Francorum. Parisiis. 1567.
[68] Mercurius in sole visus. 1609.
[69] De Cœlo. lib. 4.
[70] For a discussion of this singular phenomenon, see Treatise on Heat, p. 12; and it is worth while to remark in passing, what an admirable instance it affords of Galileo's instantaneous abandonment of a theory so soon as it became inconsistent with experiment.
[71] Ebony is one of the few woods heavier than water. See Treatise on Hydrostatics.
[72] In making this very beautiful experiment, it is best to keep the glass a few seconds in the water, to give time for the surface of the ball to dry. It will also succeed with a light needle, if carefully conducted.
[73] Nelli. Saggio di Stor. Liter. Fiorent.