70 GENERAL ANALYSIS. 



her of nerves to enable the mind to receive millions of 

 sensations of three kinds, color, and direction, at the 

 same instant, and to take in a wide field of vision. 



190. THE EYE is an organ adapted to cause the rays 

 of light, from millions of points without, to act upon mil- 

 lions of points within it, where commence nerves connect- 

 ing with ganglia. Through each nerve two sensations, 

 one of color, the other of direction, are produced, and the 

 mind is thus furnished with the data for further knowledge. 



191. THE EYE is LOCATED in the front and upper 

 part of the head, the motions of which, together with 

 those of the eye, give all the extent desirable for vision. 



192. THE APPARATUS OF SIGHT must be double, right 

 and left, and is composed, acted upon, and acts, as follows: 



Apparatus of Sight, 

 Three kinds of organs. 



Object, Rays of Light, Eye, Nerves, Ganglia, Mind, 

 Cause. 34 5 Sensations. 



ORGANS OF APPARATUS OF SMELL. 



193. ODOROUS PARTICLES are exquisitely minute, dis- 

 solved in the air, and differ as the objects do from which 

 they are derived, and require only to be brought in con- 

 tact with appropriate nerves, when each will excite its 

 peculiar sensation. 



194. To DISTINGUISH ODORS, therefore, and learn 

 through them the character of objects, it is only neces- 

 sary that the air containing them shall sweep over a del- 

 icate surface near to which nerves of smell in great 

 numbers commence, against which the laden air may at 

 times be pressed with some force. 



195. THE NOSE is an organ admirably adapted to be 

 the organ of smell. The air loaded with odorous particles 

 can be drawn through it, and over the delicate membrane 

 with which it is lined, near the surface of which commence 

 numerous nerves that extend to ganglia related to the mind. 



190. What is-? 191. Where ? 192. Write table. 193. What are ? 194. What 

 Is necessary - ? 195. What is ? 



