SYSTEMATIC SYNTHESIS OF TISSUES INTO ORGANS. 351 

 FIG. 231. FIG. 232. 



Fig. 231 shows how, by improper position, the digestory organs are di- 

 rectly compressed, and indirectly suffer for want of pure air that cannot 

 be freely inhaled; while Fig. 232 shows a proper position. The first will 

 be soon broken down, while the second will improve in health by a rea- 

 sonable amount of such exercise. When the work or reading cannot be 

 seen on account of near-sightedness, glasses should be worn, to obviate the 

 necessity of curving over the work; or it should be raised to a convenient 

 seeing distance. 



1067. It is also evident that the BLOOD MUST BE 



SUPPLIED TO THE STOMACH IN LARGE QUANTITIES during 



the formation of the gastric juice ; hence, no violent or 

 engrossing exercise, muscular or nervous, ought to be 

 engaged in immediately after eating. 



1068. THE EXHAUSTION OF THE NERVOUS SYSTEM 

 by severe labor or mental application prevents the 

 formation of gastric juice, and rest must be taken be- 

 fore eating in such cases. 



1069. Remark. ON THK OTHER HAND IT WILL BE SOMETIMES FOUND 

 that nervous exhaustion arises from want of food of the right kind : in 

 fact, this is frequently the case with those who are called upon to make 

 powerful or continued mental effort, and they require a more generous 

 diet, or one well adapted to nourish the nervous tissues. It is not every 

 man who can digest out of ordinary food the amount of nutrition neces- 

 sary to supply an active brain. In this case he must select brainial 

 food. 



Describe Fig. 231. Describe Fig. 232. 1067. Why must ? 1068. What said 

 of ? 1069. What ? 



