text:  How could the facts of geology be recollected or how indeed could they constitute a science without reference to some real or supposed bond of union some aqueous or igneous theory? How could two chemists converse on chemistry without the use of the term affinity and the theoretical conception it involves? How could a name be applied or a nomenclature adopted without that imperfect or more or less perfect grouping of facts which involves theory? As far as we can recollect all the alterations of nomenclature which have been introduced or attempted proceed upon some alteration of theory