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of something that is defined. I think it is a great pity to introduce into 
anything that pretends to'Jbe accurate logical discussion, terms which we can- 
not and do not define, because when we do that, we do not know what we are 
talking about. We can predicate nothing respecting it, if we do not know 
what the word means : I therefore decline to make any observations about 
the conservation of power. I think Mr. Newton will now see the ground of 
the difference between Mr. Moore’s and my views. An observation was 
made about vibratory motion as the force of atoms. Now, force is one thing ; 
vibratory motion is a totally different thing ; and atoms we know nothing 
about. If I am told, therefore, that vibratory motion is the force of atoms, 
I cannot understand it. It conveys no idea to my mind. The gist of Mr. 
Moore’s objections to the definitions which I have here given, and to the 
relations of force and energy which I have expressed, appear to be meta- 
physical rather than physical. At all events, I think he has offered no 
physical objection. If that be the case, I can only say that his objections do 
not appeal to my mind in opposition to the logic of facts. (Cheers.) 
The meeting was then adjourned. 
