KXKKCISE. 



.red and destroyed. The processes are physiologically the same, and the 



ts bear an exact relation to each other. As with the bodily powers, 



mntal are to be increased in magnitude and energy by a degree of 



measured with a just regard to their ordinary health and native 



or habitual energies. Corresponding, moreover, to the influence which the 



mind has in giving the nervous stimulus so useful in bodily exercise, is the 



ndence of the mind upon the body for supplies of healthy nutriment. 



I, in like manner with the bodily functions, each mental faculty is only 



to be strengthened by the exercise of itself in particular. 



It ought to be universally known, that the uses of our intellectual na- 



aru not to be properly realized without a just regard to the laws of 



that perishable frame with which it is connected ; that, in cultivating the 



mind, we must neither overtask nor undertask the body, neither push it 



)0 great a speed, nor leave it neglected ; and that, notwithstanding this 



intimate connection and mutual dependence, the highest merits on the part 



lie mind will not compensate for muscles mistreated, or soothe a nervous 



in which severe study has tortured into insanity. To come to detail, 



it ought to be impressed on all, that to spend more than a moderate num- 



of hours in mental exercise diminishes insensibly the powers of future 



application, and tends to abbreviate life ; that no mental exercise should 



t tempted immediately after meals, as the processes of thought and of 



stion cannot be safely prosecuted together; and that, without a <lii'> 



rcise to the whole of the mental faculties, there can be no 



:idness in any, while the whole corporeal system will give way beneath 



-sure upon any one in particular. These are truths completely 



; 'li>h-d with physiologists, and upon which it is undeniable tl; 



portion of human happiness depends. 



K i. POSE, A CONDITION DEMANDED BY EXERCISE. Exercise demands oc- 

 nal periods of repose, and, in particular, that a certain part of e\ 



four hours l,e spent in sleep, After having been engaged in daily 

 i pat ions for fourteen or sixteen hours, a general fed ing <>f fatigue and 

 kness is induced ; the motions of the body become ditlicult, and sen 



1, the power of volition or will suspended, and the rest of the 



tal fueulti.'s becoming more and more inactive, sink at length into a 



be of unconsciousness. The sense of sight first ceases to act by tin- 



ing f th- eyelids; then the senses of taste and smell become 



; and th-n those of hearing and touch. The muscles, also, dis- 



Ives with a (vrtain ivfcivnce to ease of position, those of the 



limi _; grown indolent before those that support flu- head, and 



it th head before those of the tiunk. In proportion as 



ii 



