ht line toward it.

[128] PAGE 48, LINE 35. Page 48, line 39. _quae sunt illae
materiae._--Gilbert's list of electrics should be compared with those given
subsequently by Cabeus (1629), by Sir Thomas Browne (1646), and by Bacon.
The last-named list occurs in his _Physiological Remains_, published
posthumously in 1679; it contains nothing new. Sir Thomas Browne's list is
given in the following passage, which is interesting as using for the first
time in the English language the noun _Electricities_:

"Many stones also both precious and vulgar, although terse and smooth, have
not this power attractive; as Emeralds, Pearle, Jaspis, Corneleans, Agathe,
Heliotropes, Marble, Alablaster, Touchstone, Flint and Bezoar. Glasse
attracts but weakely though cleere, some slick stones and thick glasses
indifferently: Arsenic but weakely, so likewise glasse of Antimony, but
Crocus Metallorum not at all. Saltes generally but weakely, as Sal Gemma,
Alum, and also Talke, nor very discoverably by any frication: but if gently
warmed at the fire, and wiped with a dry cloth, they will better discover
their Electricities." _(Pseudodoxia Epidemica_, p. 79.)

In the _Philosophical Transactions_, vol. xx., p. 384, is _A Catalogue of
Electrical Bodies_ by the late Dr. Rob. Plot. It begins "Non solum
succinum," and ends "alumen rupeum," being identical with Gilbert's list
except that he calls "Vincentina & Bristolla" by the name "Pseudoadamas
Bristoliensis."

[129] PAGE 49, LINE 25. Page 49, line 30. _non dissimili modo._--The
_modus_ {43} _operandi_ of the electrical attractions was a subject of much
discussion; see Cardan, _op. citat._

[130] PAGE 51, LINE 2. Page 51, line 1. _appellunt._--This appears to be a
misprint for _appelluntur_.

[131] PAGE 51, LINE 22. Page 51, line 23. _smyris._--Emery. This substance
is mentioned on p. 22 as a magnetic body.

[132] PAGE 52, LINE 1. Page 51, line 46. _gemmae ... vt Crystallus, quae ex
limpida concreuit._ See the note to p. 48.

[133] PAGE 52, LINE 30. Page 52, line 32. _ammoniacum._--Ammoniacum, or
Gutta Ammoniaca, is described by Dioscorides as being the juice of a ferula
grown in Africa, resembling galbanum, and used for incense.

"_Ammoniack_ is a kind of Gum like Frankincense; it grows in Lybia, where
_Ammon's_ Temple was." Sir Hugh Plat's _Jewel House of Art and Nature_ (Ed.
1653, p. 223).

[134] PAGE 52, LINE 38. Page 52, line 41. _duae propositae sunt causae ...
materia & forma._--Gil