Note 8 — RULES FOR A DICTIONARY CATALOGUE.

The subjects Animals, Horses, Plants are classes, a fact which is perhaps more evident to the eye if we use the terms Zoology, Hippology, Botany. The subdivisions of Botany and Zoology are obvious enough; the subdivisions of Hippology may be themselves classes, as Shetland ponies, Arabian coursers, Barbs, or individual horses, as Lady Suffolk, Justin Morgan.