^ 6 Dr. Fordyce's’ Lecture on Mufcular Motion. 
tion, a power which two or more particles of matter have of 
coming nearer one another. But although the finely of caufes 
of original powers be totally abfurd and futile, yet the laws of 
their aCtion are capable of invefligationi by experiment, and 
applicable to the evolving much ufeful knowledge. Need I 
remind this Society, that the inveftigation of the laws of gra- 
vitation, by Sir Isaac Newton, has rendered it immortal ? 
The inveftigation of the laws of the attraction of life has alfo 
been greatly forwarded by one of its prefent members ; but it 
is an inveftigation which will probably require ages to render 
perfeCt, 
/ 
