The advantages of a uniform statistical nomenclature, however im- perfect, are so obvious, that it is surprising no attention has been paid to its enforcement in bills of mortality. Each disease has in many instances been denoted by three or four terms, and each term has been applied to as many different diseases ; vague, inconvenient names have been employed, or complications have been registered, instead of primary diseases. The nomenclature is of as much importance in this depart- ment of inquiry as weights and measures in the physical sciences, and should be settled without delay.