fattens; as it w^uld havejifit were prefent. As, if one (hculd knock 
on's head forcibly againft a wall , v the fhaking , which the blow gives to 
the Brain, moving the interior extremities of the Nerve, which caufes 
the fenfadomof Light , the Soul has the fame fenfation , which it would 
have, if it faw a thoufand Candles .* On the contrary, if the interior ex- 
tremities of the nerves are not (haken, though the objed be prefent,it 
caufes no fenfation ^ whence it comes , that if a ftrong Ligature be 
made \ipon the middle of the Arm , and the hand be then prickt , no 
pain is felt, becaufe the (baking of the nerves that are pricked, being flop- 
ped by the Ligature, cannot reach to the extremities of the Nerves, that 
are within the Brain, 
Advertifement. 
The following Errata^ left by the Preft in Nftm.16, the Reader is de~ 
fired thus to corred. 
; - •- '• ■- v v ■ ■ ' ’ [ ' 
pAge 169* lin. 17- read, motion ofB. above the Center j G. is aljo , with a Semi-colon 
after the word Center, p.174. 1 . 1 J>, r. it-todoto the. p *77. 1.14 . r, natural days. 
p.i 8 i. 1. 16. r. of his. ib.I.»7.r. a notion. p.iJJ.1.4. r enough without. i'B. 1 . 4 $. r .tothe 
Sine of. p. 3 94. 1 , t . r. to the Sine of. 
LONDON x 
Printed for John Martin and James Alejlry y 
Printers to the Royal Society. 1 666 , 
