' ^^^^. 



# 



APPENDIX B, 



XXIX 



place ^'^ ^^' f^et 



^Pont 



^\\M.- 



f^g 



,. '' alter \ 

 spelled; J«N, 



^^'^^g thin, 

 there 



ev 



8C 



are 



^ convi 



very 



ance then between the organisms which would appear to 

 have been produced de novo within the previously-heated 

 experimental tubes, and those which come from the cavities 

 within the crystals. The conditions are unfavourable in 

 both cases, and the products which result seem to be very 

 slowly evolved. 



Because, therefore, of the close resemblance which must 

 obtain between the mode of formation of the first and of subse- 

 quent particles of one of the simplest organisms ; because 



a 



'^ce us, that I f tartrate of ammonia seems especially and peculiarly prone to 



^^^Peratiire liijj. 'i lapse into living modes of combination ; because, in addition 



-•■efore, in these ca, f t° ^^^ evidence with respect to this particular change, isomeric 



^fits must have tei | re-arrangements of other complex substances are undoubtedly 



ng ferments, and tlji I capable of taking place 'spontaneously' without the agency 



- bown to take nl« I of pre-existing living matter; and because the organisms 



Here 'spontaneoisk J ^°""^ ^" *® crystals are actually similar to those which form 

 molecular re-amiji I ^^ '^^^^ ^^ ^^^ experimental flasks,— for all these reasons 

 ■ ammonia is repkt: | combined, I deem it to be more probable that the filaments 

 compound, urea, 1 1 ^"^ . spore-like bodies found within the crystals of ammonic 



tartrate, have been slowly developed from specks of newly- 

 evolved living matter, than that they have had any other mode 



ivmg agency is Bec&- 

 exist; and there i 

 )uld imagine snd 



of origin. 



tartrate of 

 meric transfom* ] 

 :inds of living 



ions. 

 I ever 



In none 

 found a sf 



If it had not been proved that living matter could 

 form de novo, there would not be sufficient reason for believing 

 that It had occurred in this particular case; so that those 

 who are still unconvinced upon the general question will, 

 of course, not be much influenced by the evidence now 



adduced. 



\ 



CO 



n 



the same ^^ 



all my 



experiDie« 



.nd s 



odicP 



ho 



1^ 



This 



a,?re« 



■^ilarfl"*^'"^ 



exp 



jS# 



osea to 





.* 





is a 



niar 



ked 



t- 



