APPENDIX. 85 



ferent parts of the vegetable and animal creation are 

 formed, supported, and increased. 



These fluids being more and more compounded, 

 as the vegetables and animals become more perfect, 

 are coagulated, and form a regular series. The sap 

 of many plants does not coagulate spontaneously, 

 but is made to undergo this change by adding the 

 extract of Goulard ; the sap of such plants is consi- 

 dered as the most simple. In the onion there is a 

 spontaneous coagulation. In insects the blood coa- 

 gulates, but is without colour; in the amphibia co- 

 lour is superadded. The moving powers of animals 

 from the simple straight muscle, to the most com- 

 plicated structure of that organ, with the different 

 applications of elastic ligaments, form a second series. 

 The growth of bone, horn, and shell, come next in 

 order ; and the joints, which admit of free motion, 

 .inish this subject. 



The second class begins with those animals of the 

 hydatid kind, which receive nourishment, like vege- 

 tables, from their external surface, having no mouth. 

 Then follow those which are simply a bag or sto- 

 mach, with one opening, as the polypus, having no 

 organs of generation, as every part of the bag is en- 

 dowed with that power. In the leech, the structure 

 becomes more complex : for although the animal is 

 composed of a bag with only one opening, the or- 

 gans of generation, brain, and nerves, are super- 

 added, and thence a gradual series is continued to 

 those animals in which the stomach forms only a 



