HOW TO STUDY BOTANY. 
1. Caltha Pdlustris. 2. Single leaf of do. 3. Calyx of do. 4. Stamens of do, 
5. Pistils of do. 6, Pistil. 7. Section of Pistil. 8. Stamen. 9. Vertical Sec- 
tion of the flower. 
