The Rev. J. H. Jellettow the Equilibrium and Motion of an Elastic Solid. 217 



denoting, as we have seen, that the molecular force is, in the sense above defined, a force 

 of attraction or repulsion. If, however, we confine ourselves to the strict sense of the 

 terms attraction and repulsion, we ought to define the force solely by its direction, without 

 any regard to its intensity. Properly speaking, therefore, the equations of motion of a 

 system of attracting or repelling molecules will, in their most general form, contain thirty 

 distinct constants. 



