LAMARCK’S THEORY OF EVOLUTION 239 
presents in each organic kingdom, finally to certain 
changes which are seen to be undergone in certain 
circumstances, we are convinced: 
“1, That the nature of organic movement ‘is not 
only to develop the organization but also to multiply 
the organs and to fulfil the functions, and that at 
the outset this organic movement continually tends 
to restrict to functions special to certain parts the 
functions which were at first general—z.e., common to 
all parts of the body ; 
“2. That the result of mutrition is not only to 
supply to the developing organization what the or- 
ganic movement tends to form, but besides, also by 
a forced inequality between the matters which are 
assimilated and those which are dissipated by losses, 
this function at a certain term of the duration of life 
causes a progressive deterioration of the organs, so that 
as a necessary consequence it inevitably causes death ; 
'o..That the property of the movement.of the 
fluids in the parts which contain them is to break out 
passages, places of deposit, and outlets; to there 
create canals and consequently different organs; to 
cause these canals, as well as the organs, to vary on 
account of the diversity both of the movements and 
of the nature of the fluids which give rise to them; 
finally to enlarge, elongate, to gradually divide and 
solidify [the walls of] these canals and these organs 
by the matters which form and incessantly separate 
the fluids which are there in movement, and one part 
of which is assimilated and added to the organs, 
while the other is rejected and cast out; 
“4, That the state of organization in each organism 
has been gradually acquired by the progress of the 
influences of the movement of fluids, and by those 
changes that these fluids have there continually under- 
gone in their nature and their condition through the 
habitual succession of their losses and of their re- 
newals; 
