. XXXViL i DIGESTION, SECRETION, c. 



SECT. XXXVII. 



OF DIGESTION, SEC&ETtdtf, 



j. Cryflals increase by the greater attraction of their 

 jutes. Accretion by chemical precipitations, by weld- 

 ing, by preffure, by agglutination. II. Hunger, di- 

 gejlion, why it cannot be imitated out of the body. 

 Lacleals abforb by animal feleflion, or appetency. III. 

 The glands and pores abforb nutritious particles by 

 an ima I feleflio n . Organ ic p a r tides of Buffon . Nu- 

 trition applied at the time of elongation of fbres. 

 Like inflammation. IV. // feems eafier to have pre- 

 ferred animals than to reproduce them.. Old age and 

 death from, inirr liability. Three caufes of this. Ori- 

 ginal fibres of the organs of fenfe and mufcles un- 

 changed. - V. Art of producing long life. 



I. -THE larger cryftals of faline bodies may be 

 Conceived to arife from the combination of fmaller 

 Cryftals of the fame form, owing to the greater at- 

 tractions of their fides than of their angte. Thus 

 if four cubes were floating in a fluid, whofe friction 

 or refinance is nothing, it is certain the fides, of 

 thefe cubes would attract each other ftronger than 

 their angles; and hence that thefe four fmaller 

 cubes would fo arrange themfelves as to produce one 

 larger one. 



There are other means of chemical accretion, 



fuch as the depofitions of diflblved calcareous or 



filiceous particles, as are feen in the formation of 



the ftala&ites of limeftone in Derbyfhire, or of cal- 



M m 2 ccdone 



