[ 465 ] 
Explanation of Fig. 1. Tab. XXII. 
a, b , Two ’Tourmalins fixed upon 
c. c. Sticks of the hardefi kind of fealing-wax. 
d > d y Two handles of wood, in which the other 
ends of the fealing-wax are fecured. 
J, f A hand of wood, with holes to reft the han- 
dles therein, when the Tourmalins are unem- 
ployed. 
Explanation of Fig. 2. Tab.XXIIL 
a> a> Two very fmall balls of the pith of Elder, 
fufpended by 
by by The finefi flaxen threads about fix inches long- 
The balls and threads together weigh about the 
fiftieth part of a grain. 
Thele threads are neatly faflened in a fmall 
hole on the under fide of the thin end, and fo as 
to touch the wood 
Cy Which is mahogany. Every part of this 
fmall piece of wood is well polifhed, and neatly 
joined to *- 
dy the cylinder of amber; which is about four 
inches long, and near half an inch thick. It is 
finely polifhed alfo, and the other end Hides 
into 
<?, which is part of the arm : e is joined to f by a 
fcrew ; and the other end of 
f Hides into the upper part of the Hand g. One 
end of the upright h fcrews on to g, and the 
other end, into the crofs pieces/, /, and kk ; 
which are let into each other by a mortafs, and 
thus 
