LAW OF THE ANGLE, ETC. 249 



puzzle us; but they hardly interfere with any re- 

 ceived general truths, because we have as yet no 

 truths of very high order respecting the connexion 

 of chemical constitution and crystalline form. Di- 

 morphism does not interfere with isomorphism; the 

 two classes of facts stand at the same stage of 

 inductive generalization, and we wait for some 

 higher truth, which shall include both, and rise 

 above them. 



