text:  Does not experience teach us that much if not the whole of our sentient nature becomes itself in turn a series of sensations? Does not the sight--that power which contains the whole visible space and embraces distances which no astronomer can compute--does it not abjure its high prerogative and take rank within the sphere of sense--itself a sensation--when revealed to us in the solid atom we call the eye? Here it is the touch which brings the sight within and very far within the sphere of vision