(310) 
fetions, asitwouldbave/ifit were prefent. As, if one fhould knock 
on's head forcibly againOt a wall , the (haking , which the blow gives to 
the Brain, moving the interior extremities of the Nerv«, which caufes 
-^the fenfatidn of light , the Soul has the fame fcnfation , 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 obj eft be prefent,ic 
caufes no fenfation • whence it comes , that if a ftrong Ligature be 
made upon the middle of the Arm , and the hand be then prickc, no 
pain is felt, becaufe the fliaking of the nerves that are prkked,being flop- 
ped 6y the Ligature, cannot reach to the extremities of the Nerves, thac 
are within the Brain* 
AdvertifemenK 
The following Errata^ kk by the Pnfi in Num.16, the Reader is de- 
fired thus to eoiTed:^ 
p \ge 1^9. linri?* read, motion ofB, above the Center ; G, is afjfo, with a Semi-colon 
affer the word Center, p. 274. 1. I J;, t. it todo to the. p. 177/1,14. r. natural djtys, 
p.iSi. \.\6,x,ofhi$. {h.\.x7.r. a notion, f^z^'^A'^'T^ enough tviihoHt, ib.l.4S. x.tothe 
Sin eof. p. j 94 . 1 , i . r. to the Sine cf. 
LONDON, 
Printed for John Martin and James Alejlry, 
Printers to the Royal Society. 16(16. 
