CONTENTS. 



PAGE 



A. THE ART AXD SCIEXCE OF GfARDENING- 1 



B, THE SCIENCE OF GAEDENIXG . . . 2 



I. The Op.gaxs and Parts of Plants . . 2 



1. Leaves .... ... 3 



2. Roots . , 4 



3. Spongelets . . . . . . 5 



4. Pores ....... 6 



5. Sap and pulp . . . . . . 8 



II. The Agents tthich afeeci Plants . . 9 



1. Eeat ... ... 9 



2. Light 10 



3. Ak and gases . . . . .11 



4. Water 12 



5. Electricity 13 



6. Weatlier 13 



7. Soils 14 



8. Maniu^es 16 



