[224] PAGE 162, LINE 2. Page 162, line 3. _quare & respectiuum punctum ...
excogitauit._--The passage referred to is in _The newe Attractiue_ of
Robert Norman (Lond., 1581), chap. vi.

"Your reason towards the earth carrieth some probabilitie, but I prove that
there be no _Attractive_, or drawing propertie in neyther of these two
partes, then is the _Attractive_ poynt lost, and falsly called the poynt
_Attractive_, as shall be proved. But because there is a certayne point
that the Needle alwayes respecteth or sheweth, being voide and without any
_Attractive_ propertie: in my judgment this poynt ought rather to bee
called the point Respective ... This Poynt _Respective_, is a certayne
poynt, which the touched Needle doth alwayes _Respect_ or shew ..."

[225] PAGE 165, LINE 2. Page 165, line 2. _De pyxidis nauticae vsitatae
compositione._--Gilbert's description of the usual construction of the
mariner's compass should be compared with those given by Levinus Lemnius in
_The Secret Miracles of Nature_ (London, 1658); by Lipenius in _Navigatio
Salomonis Ophiritica_ (Witteb., 1660, p. 333); and with that given in
Barlowe's _Navigators Supply_ (London, 1597). See also Robert Dudley's
_Dell' Arcano del Mare_ (Firenze, 1646).

[226] PAGE 165 deals with the construction; the process of magnetizing by
the loadstone had already been discussed in pp. 147 to 149. It is
interesting to see that already the magnetized part attached below the
compass-card was being specialized in form, being made either of two pieces
bent to meet at their ends, or of a single oval piece with elongated ends.
The marking of the compass-card is particularly described. It was divided
into thirty-two points or "winds," precisely as the earlier "wind-rose" of
the geographers, distinguisht by certain marks, and by a lily--or
fleur-de-lys--indicating the North. Stevin in the _Havenfinding Art_
(London, 1599), from which work the passage on p. 167 is quoted, speaking
on p. 20 of "the Instrument which we call the Sea-directorie, some the
nautical box, ... or the sea compasse," mentions the "Floure de luce"
marking the North.

The legend which assigns the invention of the compass to one Goia or Gioja
of Amalfi in 1302 has been already discussed in the Note to page 4. Gilbert
generously says that in spite of the adverse evidence he does not wish to
deprive the Amalfians of the honour of the construction adopted in the
compasses used in the Mediterranean. But B