Till CONTENTS. 



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sions as to it Consciousness moves through our bodies 

 Capable of extension on surfaces Consciousness of space- 

 Action of the senses not necessary to Consciousness in 

 them Power of Consciousness over the faculties Pleasure 

 and Pain Attention Thought Memory . .19 



CHAPTER III. 



The senses the physical media of the Consciousness The 

 evidence of the senses of touch and taste Its impartiality 

 Its positiveness Evidence of the eye and ear compara- 

 tive and relative Co-operation of the senses without col- 

 lusionDistinctive perceptions or impressions of the 

 senses The current of ideas How stimulated Its im- 

 portance Our relative perception of hardness, size, weight, 

 colour, pitch of sound, &c. Our positive perception of 

 form Standards of comparison Size differently seen by 

 different individuals Erect vision and the inversion of 

 images on the retina Neither the true size nor true posi- 

 tion of objects presented to us by the eye Accuracy of the 

 eye Its superiority over photography A defect of photo- 

 graphyHow caused Further remarks on comparison 

 Mirrors and mode of vision ...... 87 



CHAPTER IV. 



The limited range of our positive or absolute knowledge of 

 external matter How much our knowledge is merely 

 comparative How necessary, therefore, that we should 

 test everything where we can Difference in the mode in 

 which truth and falsehood demand our credence Spirit- 

 ualism and its seances Its profanation of the dead 

 Table-turning Faraday's exposure of it Simple appli- 

 cation of his indicator for the detection of unconscious 

 lateral pressure and of confederacy Mesmerism Its more 

 preposterous pretensions abated Our tendency to neglect 

 the true knowledge of what is familiar Our ignorance 

 of why or how our hands instantly obey our will 

 Consciousness can control and direct the operations of 

 matter Is it the force by which motion is accomplished ? 

 Probability that it is not The vital forces and the forces 

 of motion distinguished The blocd the life, a mystery 



