Four Classes of Readers

Readers may be divided into four classes: 1. Sponges, who absorb all they read, and retum it nearly in the same state, only a little dirtied. 2. Sand-glasses, who retain nothing, and are content to get through a book for the sake of getting through the time. 3. Strain-bags, who retain merely the dregs of what they read, and retum it nearly in the same state, only a little dirtied. 4. Mogul diamonds, equally rare and valuable, who profit by what they read, and enable others to profit by it also.