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PHYSICAL ayy LITERARY. 27 
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body can pafs from it to another, than that 
the figure of one body can pafs from it to an- 
other. In general, qualities, properties, and 
affections, are infeparable from the particu- 
lar bodies to which they belong. They have 
no feparate exiftence, and therefore cannot 
be conveyed, even in the imagination, from 
one body to another. The green colour of 
this field, cannot be taken from it, and be- 
- {towed upon another. All that can be done, 
Is to give the other a fimilar colour. My i- 
deas or feelings cannot be conveyed from me 
to any other perfon, tho’ fimilar feelings 
or ideas may be produced in that other per- 
fon. This is not a play about words ; it leads 
to the explanation of a phoenomenon which 
natural philofophers have not been able to ex- 
plain with any fatisfaction. When motion is 
produced in one body by the impulfe of an- 
other, there is no neceflity to embrace fo ab- 
furd a doctrine, as that motion pafles from 
the one to the other. The motion produced 
is eafily deducible, from the principles above 
laid down. The vis infita and the vis refi- 
flentia, are fufficient to account for all the 
effects that proceed from the collifion of hard 
bodies which have no elafticity.. If the re- 
fiftance 
