.

[118] PAGE 48, LINE 14. Page 48, line 16. _Nam non solum succinum, &
gagates (vt illi putant) allectant corpuscula._--The list of bodies known
to become electrical by friction was not quite so restricted as would
appear from this passage. Five, if not six, other minerals had been named
in addition to amber and jet.

(1.) _Lyncurium._ This stone, about which there has been more obscurity and
confusion than about any other gem, is supposed by some writers to be the
tourmaline, by others a jacinth, and by others a belemnite. The ancients
supposed it to be produced from the urine of the lynx. The following is the
account of Theophrastus, _Theophrastus's History of Stones. With an English
Version_ ..., by "Sir" John Hill, London, 1774, p. 123, ch. xlix.-l. "There
is some Workmanship required to bring the Emerald to its Lustre, for
originally it is not so bright. It is, however, excellent in its Virtues,
as is also the _Lapis Lyncurius_, which is likewise used for engraving
Seals on, and is of a very solid Texture, as Stones are; it has also an
attractive Power, like that of Amber, and is said to attract not only
Straws and small pieces of Sticks, but even Copper and Iron, if they are
beaten to thin pieces. This Diocles affirms. The _Lapis Lyncurius_ is
pellucid, and of a fire Colour." See also W. Watson in _Philos. Trans._,
1759, L. i., p. 394, _Observations concerning the Lyncurium of the
ancients_.

(2.) _Ruby._

(3.) _Garnet._ The authority for both these is Pliny, _Nat. Hist._, book
xxxvii., chap. vii. (p. 617 of English edition of 1601).

{39} "Over and besides, I find other sorts of Rubies different from those
above-named;... which being chaufed in the Sun, or otherwise set in a heat
by rubbing with the fingers, will draw unto them chaffe, strawes, shreads,
and leaves of paper. The common Grenat also of Carchedon or Carthage, is
said to doe as much, although it be inferiour in price to the former."

(4.) _Jasper._ Affaytatus is the authority, in _Fortunii Affaitati Physici
atque Theologi ... Physicae & Astronomicae c[=o]siderationes_ (Venet.,
1549), where, on p. 20, he speaks of the magnet turning to the pole,
likening it to the turning of a "palea ab Ambro vel Iaspide et hujuscemodi
lapillis lucidis."

(5.) _Lychnis._ Pliny and St. Isidore speak of a certain stone _lychnis_,
of a scarlet or flame colour, which, when warmed by the sun or between the
fingers, attracts straws or leaves of papyrus. Pliny puts th