even during the formation of strata; to whatcauses are these inequalities to be referred?

1. Crystallization.

This term is employed in different senses.It sometimes means an aggregation ofintegrant molecules arranged by polarityinto a definite essential form, each moleculebeing composed of the same elementsunited in the same proportions. ProfessorJameson appears to think that even this, themost perfect species of crystallization, hasnot been inactive in determining the figureof the surface of the earth : what are calledstrata he supposes to be in many cases merelaminae of crystals, which, being produced,would be found to meet at determinateangles. I do not know the grounds on whichthis opinion rests ; but strata and beds agreeso closelyin character,that I cannotpersuademyself they owe their existence to diffe-rent causes. Now there is no instanceknown of a crystal made up of dissimilarlaminae. The primitive molecule of many