190 DETAILED SYNTHESIS. 



193. ALL THE ACTIVE TISSUES ARE CONSTITUTED in 

 part of phosphorus ; none of the passive tissues are, ex- 

 cept as a component of their earthy constituents. 



194. Query. MAT NOT THE ACTIVE TISSUES, in performing their 

 action, so far decompose that their phosphorus and a part of their nitro- 

 gen and sulphur will be no longer of value in the Body, while the bal- 

 ance of the nitrogen and sulphur, together with their oxygen, hydrogen, 

 and carbon, may, after some modification, be used to constitute the gela- 

 tine of the passive tissues ? 



195. Remark. THE SUBSTANCES ELIMINATED BY THE KIDNEYS after 

 unusual activity of the brain, would tend to sustain the suggestion just 

 made. At such a time the eliminations of the kidneys will abound in 

 ammonia composed in part of nitrogen, and hi phosphates. 



196. AlST ENTIRE REVIEW OF THE NECESSITIES OF 



THE BODY, as exhibited by the constitution of the Tis- 

 sues and their demands, shows that there is a requirement 

 for three classes of substances in the Blood: 1st, those 

 from which the Albuminoid or active tissues can be 

 formed ; 2d, those from which the Gelatinous or passive 

 tissues can be formed ; and 3d, those which are Calorific. 



197. OF THE THREE CLASSES OF SUBSTANCES, the 



plant furnishes only two, the 1st and 3d, and therefore 

 the 2d must come from one or both of the other two. 

 But as gelatine contains more elements than exist in the 

 calorific substances, it cannot be formed from them, and 

 therefore must be directly or indirectly produced from 

 the albuminoid class. 



Inf. This view suggests another argument in favor of the idea that 

 the gelatinous tissues are constituted from the decomposing active tis- 

 sues, with the addition of such chemical compounds as are necessary. 



Remark. When Bones are broken, or the other gelatinous tissues 

 are to be repaired, it is not improbable that they may be constituted 

 directly from the albuminous food, of which much at such times is re- 

 quired, and should be eaten. Such tissues, at such times, cannot be 

 rapidly repaired from a slop diet, and unless there is serious objection, a 

 hearty diet and plenty of it should be allowed ; soft-cooked eggs being 

 one of the best articles, and meats being preferable to other diet. 



193. How? 194. Query. 195. What shown by ? 196. What said of ? 

 197. What said ? What Inf. ? What if bones are broken ? 



