2io The Conclufion, 



vention, a Cobweb of the Brain ? — What do 

 we really underftand when we are told, " That 

 " the magnetical Effluvia do not proceed 

 " intrinfecally from the Stone, butarecer- 

 '^ tain extrinfecal Particles, which approach- 

 " ing to the Stone and finding congruous 

 '* Pores and Inlets therein, are channePd 

 " through it, and having acquired a Motion 

 *' thereby, do continue their Current fo far, 

 *' till being repulfed by the ambient Air, 

 *' they recoil again and return in a vortical 

 *' Motion, and fo continue their Revolution 

 •' for ever through the Pores of the Mag- 

 '' net? " — Such Examples will, I hope, be 

 my Excufe for not attempting to folve any 

 of the Phsenomena of the Polype^ for which 

 I have neither fufficient Ingenuity nor In- 

 clination. 



I much qiieftion if we are not alfo great- 

 ly miftaken when we undertake to form a 

 Judgment of the Senfations, Perceptions, 

 Ideas and Under (landing of other Creatures ; 

 fince we have no Means of doing it but by 

 the Standard of our own : which is, per- 

 haps, as unfit for the Purpofe as a Pair of 

 Scales would be to meafure the Height and 

 Dim^enfions of a Building. 



The PercufHon of Light or Air, or the 

 Contaft of other material Bodies on Nerves 



dif- 



