This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1817 Excerpt: ...the sensation is certain. It is not an article of opinion, but of positive knowledge. I ascribe this to a cause, Q 2 nor nor am I exposed to deception; for I know that if a sensation exists, a cause must exist. But it is not equally certain that I have a perfect knowledge of the cause. I may suppose, that hardness is ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1817 Excerpt: ...the sensation is certain. It is not an article of opinion, but of positive knowledge. I ascribe this to a cause, Q 2 nor nor am I exposed to deception; for I know that if a sensation exists, a cause must exist. But it is not equally certain that I have a perfect knowledge of the cause. I may suppose, that hardness is in the stone itself; this is a very natural supposition until I am better instructed. How many myriads of flies are there which run upon the surface of a still water, in a summer evening, without falling in or having their feet wet! If they could reason, they would strenuously maintain that water is in its own nature impenetrable; and if they could smile, they would smile at the apprehension of being.drowned, by falling to the bottom of a hard impenetrable substance. When we ascribe warmth to the sun, we are under no obligation to believe that his beams are intrinsically hot; they may simply possess the power of raising that sensation in sentient beings. The French and Italian idioms are founded on this idea, //fait chaud, Fa caldo--It makes hot. I smell the odour of a rose: that is, the rose emits effluvia which excite pleasing sensations in me, by affecting the olfactory nerves adapted to the sensation; and without which it could not exist: hence it is never perceived by the eyes or the ears; while a certain body we call light, and certain vibrations of atmospheric air, are adapted to affect the eyes and the-ears, but not the smell or the taste. But we need not enlarge much under this head, as Dr. Beattie has confuted himself by the following concession: "I will acknowledge that our senses-do often impose upon us." How does this quadrate with the bold unqualified assertion, introductory of the subject before us, "Things are as ...
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