<6 GENERAL ANALYSIS. 



the data of knowledge of external objects, its organs of 

 sense being of six kinds, corresponding to the kinds of 

 apparatus to which they belong, as follows : (to be read 

 from right to left.) 



f General Ganglia; Nerves; Gene- 



SENSATORY APPARATUS \ ral 0r S ans of Sense ' (^ 



Eye. 



[Specials Ganglia; Nerves; Organs J Nose. 



of ] Mouth. 

 Sense. Skin. 



L Muscles. 



Parts of the Skeleton are also to be appropriated to 

 the Apparatus of Sensation, for, though in one respect 

 not essential to sensation, it has been constituted in some 

 particulars with especial reference to the Sensatory Ap- 

 paratus. 



224. Inf. ALL PARTS OF THE BODY, however minute, 

 are connected with the Ganglia of the Brain by means of 

 nerves, and can produce an infinite number of sensations. 



225. Query. Is each different kind of sensation pro- 

 duced by different nerves, or can many kinds of sensa- 

 tion be produced through the same nerve ? 



226. MANY DIFFERENT SENSATIONS CAN BE CAUSED 

 THROUGH THE SAME NERVE, for in the use of the eye all 

 the different colors at different times act on all the 

 nerves, and are equally recognized by each. 



227. Query. ARE ALL THE NERVES ALIKE, being 

 only channels of different influences, or are the Ganglia 

 unlike? 



228. THE SAME CAUSE PRODUCES DIFFERENT SENSA- 

 TIONS by acting on different nerves. The nerve of sight 

 pinched, pricked, or cut across, does not cause a sensa- 

 tion of pain, but of light. Electricity passed through 

 the nerves of muscular sense, of touch, taste, smell, 

 sight, and hearing, produces in each case the sensation 

 appropriate to the nerve. Therefore, either the nerves 

 or the ganglia differ from each other, probably the latter, 



223. Row is classed ? Write table. What relation has the skeleton to 

 8. Ap. ? 224. What cao produce ? 2J6. Cun ? 227 ? 223 Does ? 



