"DIRECTIVITY" A WITNESS OF MIND 83 



for, but also a unity of purpose. Things in Nature are 

 not only related to one another in form, but they stand 

 related as means to ends. And this relationship is as 

 all-pervading as that of form. There is not an object in 

 Nature that does not stand in the relationship of a means 

 to something as an end. And there exists a unity in the 

 ends as well as in the forms. All molecular motions 

 must consequently have this double relationship of plan 

 and purpose. How, then, is all this order and unity both 

 of plan and purpose in molecular motions to be accounted 

 for?" 



Mr, Croll concludes his paper with the following 

 heading — " Molecular Motion in Relatioii to Ihtity of 

 Plan". 



" The form assumed is due, not to the motion of the 

 molecules, but to the determination of that motion — to 

 the way in which the motions are guided and adjusted in 

 relation to one another. It is not the energy which con- 

 veys the bricks that account for the form of the house, 

 but that which guides and directs the energy. So far as 

 the form of the house is concerned, it is a matter of in- 

 difference whether the bricks are conveyed on the backs 

 of labourers or transported by a steam crane. In like 

 manner, in accounting for organic forms, we must exhibit 

 not the mere energy which moves the molecules, but that 

 which directs and guides the energy." 



Of the fifteen authors quoted by Prof. Dolbear, 

 Lankester is the only one who includes "form" as the 

 " outcome of the operation of the laws of physics and 

 chemistry " ; all the others omit this fundamental word, 

 upon which Evolution depends. 



The question to be considered is. Can this marvellous 

 adjustment of molecular motions be explained by any- 

 thing which is found within the domains of chemistry and 



