SECT. XXXTX. i. GENE R A. T I O N. 545 



// acqui> es nciv in it abilities, and fenfilnlities with new or- 

 ganizations, as in wnmded f nails, polypi, moths, gna's, tad- 

 poles. Hence new parts are acquired by addition not by dif+ 

 tcntir.n 3. All parts of the body giow if not confined. 4. 

 Faujes deficient at their extremities, or have a auplicaturs of 

 parts. Monfiious bi>th*. Double parts of vegetables. 5. 

 Afulfs cannot be formed by diftention of ttit feminal ens. 

 6. Families of animals ft om a mixture of their orders. Mules 

 impcrfeft. 7. Animal appetency like chemical affinity. Vis 

 fabricatrix and mcdicatrix of nature. 8. 'I he changes of ani- 

 mah before and after nativity. Similarity ef their Jlruclure. 

 Changes in them from luft, hunger, and danger. All warm- 

 blooded animals derived from one living filament. Cold-blooded 

 animals, infefls, worms, vegetables, derived alfo from one 

 living fibmtnt. A'fale animals have teats. Male pigeon 

 gives milk The world iff elf generated. The caufe of caufcs. 

 A ftate of probation and rcfpon fib dity. V. I. Efficient cauje 

 of the colours of birds eggs, and of hair and feathers, which 

 become white in fnoivy countries. Imagination of the female 

 colours tie egg Ideas or motions of the retina imitated by the 

 extremities of the nerves of touch, or rete mucofum. 2. Nu- 

 triment fupplied by the female of three kinds. Her imagina- 

 tion can only affefl the fir Jl kind. Mules how produced, and 

 mulattocs. Organs of reproduction why deficient in mules. 

 Eggs with double yolks. VI. I. Parlous fecretisns produced 

 by the extremities of the veffels, as in tJie glands. Contagious 

 matter. Atfany glands affetted by plcafurable ideas, as thofe 

 ichich fecreie the Jemcn 2. Snails and worms are herma- 

 phrodite, yet cannot impregnate themfelves. Final caufe of 

 this. 3. The imagination of th$ male forms ifa fex. Ideas > 

 or motions of the nerves of vifwn or of touch, are imitated by 

 the ultimate etch emitie$ of the glands of the tejies, which mark 

 the fex. This effefl of the imagination belongs only to the 

 male. The fex of the embryon is not owing to accident. 4. 

 C.aufes of the changes it$ animals from imagination as in mon- 

 fiers. Frem the male. From the female. 5. Mifcarriages. 

 from fear. . Power of the imagination of the male over 

 the colour, form, and fex of the progeny. An injlance of. 

 7. Aft of generation accompanied with ideas of the male or . 

 fcmalejotm. Art of begetting beautiful children of either fex. 

 VII. Recapitulation. Vlil. Conclujion. Of caufe and ef- 

 fect. The atomic phi'ofophy leads to a fir ft caufe. 



I. THE ingenious Dr. Hartley in his work on 

 ail;, and ibme other philofophers, have been of 



opinion 



