68 GENERAL ANALYSIS. 



thus the hearing through both imperfect, and perfect 

 through one with the other closed. 



180. THE EAR is PLACED in the side of the head, 

 where it will most readily catch each passing air-wave, 

 and where it can be easily turned in any direction to 

 assist in judging whence the wave came. 



Thus in the simplest manner, and with the most ex- 

 quisite delicacy, is the ear made useful to a wonderful 

 degree, and will be found still more admirable when the 

 details of this organ are wrought out. 



181. THE APPARATUS OF HEARING, through which 

 waves of air act, is double, being right and left, and is 

 composed, acted upon, and acts, as follows : 



Apparatus of Hearing, 

 Three kinds of organs. 



1 -n a 



L i A - ^ D 



Object, Waves of Air, Ear, Nerves, Ganglia, Mind. 

 Cause. 34 5 Sensations. 



ORGANS OF APPARATUS OF SIGHT. 



182. RAYS OF LIGHT are of many different colors 

 and shades, and pass off in a radiating manner from the 

 minutest points of all objects except those called black. 



183. SIMILAR OBJECTS THROW OFF similar, and dis- 

 similar objects dissimilar, colored rays, and therefore 

 they may be the means of distinguishing the character 

 of objects. 



184. THE MINUTEST POINTS OF OBJECTS (which are 

 in fact the real objects of vision) are in different posi- 

 tions, and therefore throw off rays in different directions, 

 each in a direct line from its starting-point. Therefore, 

 to know the direction of a ray of light is to know the 

 direction of the object whence it came. 



185. TO LEARN THE CHARACTER AND DIRECTION OF 



OBJECTS, the mind requires means for distinguishing the 

 color and direction of rays of light. 



ISO. Where ? 181. How is composed? Table? 182. What are ? 

 188. What do ? 184. Where nre ? 186. What required ? 



