1 86 The Development Theory. 



it ought to be a service to the cause of truth 

 to spread before the public the evidence of the 

 extent to which the development theory has 

 already passed into general acceptance, and 

 also to attempt to show that this acceptance, 

 where accomplished through intelligent 

 weighing of its truth, has in it no tendency to 

 atheism. 



Such is the aim of these pages. No effort 

 will be made to defend or to condemn ac- 

 cepted views, only to record them and their 

 results. 



But a few years ago light, heat, electricity, 

 chemical reactions and mechanical motion 

 were supposed to be due to entirely separate 

 acts of creation. It is now clearly seen that 

 these and other physical forces are only sep- 

 arate links of one chain of underlying natural 

 force. It is demonstrated that nothing of 

 this underlying force is ever wasted. The 

 motion of a mill, of an arm, of a steam engine, 

 occurs because heat or some other link of the 

 chain is changed into motion. The motion 

 thus created expends itself by becoming again 



