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the following appears to be the mode of re-production: by a 

 function (or by certain properties) of life a secretion is produced 

 from the surface, or the place whence the new organization com- 

 mences: this secretion is lymph; by assimilation life is increased 

 in this place, and its sphere is extended ; but for the lymph pre- 

 viously effused, life, wanting an alliance with the material, would 

 be dissipated, but the lymph being effused, life as it increases, 

 occupies a determinate sphere, allying itself with matter, which is 

 done by an affinity before mentioned. The life produced is con- 

 formable with that which produces it; thus, the life of a tube 

 occupies, or by progressive change assumes, a tubular sphere (this 

 is settled by relations mentioned in the article on the ovum), and 

 by its tendency, whether as to place or properties, the organic par- 

 ticles which it claims, or separates from the material, are laid 

 down: in this case it may possibly have a double source of the 

 organic particles, as well as of spiritual elements; for we have 

 reason to think that both are possessed, as well by the lymph 

 already effused, as by the blood or circulating fluids, each alike 

 wanting the influence of life for the consummation of a final 

 purpose. 



56. That the lymph is prepared previous to organization, 

 seems to reflect some light upon a former question, viz. whether 

 particles are separated from the blood during assimilation or after- 

 wards 1 The fact just mentioned indicates the latter, which has 

 been before thought the most probable : for if life aggregated par- 

 ticles at the time of assimilation there would be no need of a 

 medium for its reception, seeing that it and the particles might 

 grow together from the surface whence the organization begins. 

 We next come to consider the second class of the instances of 

 regeneration, viz. of parts once existing, but now totally removed. 

 57. We have found but little difficulty in getting a concep- 

 on of some sort of the mode of regeneration in structures but 

 partially destroyed, our notions of growth have helped us nearly 

 to a solution in this case; but by what processes of the agents of 

 growth are parts, wholly destroyed, re-produced, as from a nucleus 

 in a distinct texture? Thus, in the regeneration of a limb, a 

 muscle is begun and developed to its proper extent, or a bone 

 grows in a cylindrical form, and at a certain point osseous growth 

 ceases, and cartilage is produced, and then proceeding on from 

 this texture, or by mediate connections, bone is again generated, 

 as in the entire formation of a new limb; or, in the case of a snail 

 which has suffered decollation, from the trunk proceeds the neck, 

 the head formed from the neck: in the progress of organization, 

 the mouth, the lips, &c. are developed; or, in vegetable re-pro- 

 duction, a slip puts forth shoots, these at one period smooth and 

 similar throughout, at anotherat certain places forming branches,&c. 

 58. As the regeneration before described refers to the pro- 

 duction of resemblances, so its processes of vital properties are 

 chiefly those of assimilation; as in the latter cases the production 



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