The astronomer specialized in studying the magnitude of stars and classifying their brightness.
In classifying and diagnosing mood disorders, doctors determine if the mood disorder is unipolar or bipolar.
Pregnancy category-A system of classifying drugs according to their established risks for use during pregnancy.
In the effects of simpler poisons the recognition of unity in diversity, as in the affiliation of a peripheral neuritis to arsenic, illustrated more definitely this serial or etiological method of classifying diseases.
But it is difficult to speak too highly of his immense industry in collecting, classifying and arranging these three huge volumes of 80 books and 9885 chapters.
