01, book xxxvii., ch. x., p. 625) runs:

"Catochitis is a stone proper unto the Island Corsica: in bignesse it
exceedeth ordinarie pretious stones: a wonderfull stone, if all be true
that is reported thereof, and namely, That if a man lay his hand thereon,
it will hold it fast in manner of a glewie gum."

[191] PAGE 111, LINE 7. Page 111, line 7. _Sagda vel Sagdo._--Albertus
Magnus in _De Mineralibus_ (Venet., 1542, p. 202) says:

"Sarda quem alij dicunt Sardo lapis est qui se habet ad tabulas ligni sicut
magnes ad ferr[=u], et ideo adhaeret ita fortiter tabulis nauium quod
euelli n[=o] possit, nisi abscindatur cum ipso ea pars tabulae cui
inhaeserit, est aut[=e] in colore purissimus nitens."

And Pliny (_op. citat._, p. 629):

"Sagda is a stone, which the Chaldeans find sticking to ships, and they say
it is greene as Porrets or Leekes."

[192] PAGE 111, LINE 8. Page 111, line 8. _Euace._--Evax, king of the
Arabs, is said to have written to Nero a treatise on the names, colours,
and properties of stones. See the note on Marbodaeus, p. 7, line 20.

[193] PAGE 113, LINE 14. Page 113, line 19. _repulsus sit._ The words read
thus in all editions, but the sense requires _repulsa sint._

[194] PAGE 113, LINE 23. Page 113, line 29. _Electrica omnia alliciunt
cuncta, nihil omnino fugant vnquam, aut propellunt._ This denial of
electrical repulsion probably arose from the smallness of the pieces of
electric material with which Gilbert worked. He could hardly have failed to
notice it had he used large pieces of amber or of sealing-wax. Electrical
repulsion was first observed by Nicolas Cabeus, _Philosophia Magnetica_,
Ferrara, 1629; but first systematically announced by Otto von Guericke in
his treatise _Experimenta Nova (ut vocantur) Magdeburgica, de Vacuo Spatio_
(Amstel., 1672).

[195] PAGE 113, LINE 29. Page 113, line 37. _cum de calore quid sit
disputabimus._--The discussion of the nature of heat is to be found in
Gilbert's _De Mundo nostro Sublunari_ (Amstel., 1651), lib. i., cap. xxvi.,
pp. 77-88.

[196] PAGE 115, LINE 23. Page 115, line 23. _trium vel quatuor
digitorum._--Here as in all other places in Gilbert, _digitus_ means a
finger's breadth, so that three or four digits means a length of two or
three inches, or from six to eight centimetres.

[197] PAGE 117, LINE 26. Page 117, line 25. _ille Thebit Bencorae
trepidationis motus._

"Trepidation in the ancient Astronomy denotes a motion which in the
Ptolema