THE THEORY 



HORTICULTURE: 



AN ATTEMPT TO EXPLAIN 



THE PfllNOIPAL OPERATIONS OF GARDENING 



UPON PHYSIOLOGICAL PRINCIPLES. 



JOHN LINDLET, PH.D. F.R.S., 



VICE-SECRETARY OF THE HORTICULTURAL SOCIETY OP LONDON, AND PROFESSOR OF 

 BOTANY IN UNIVERSITY COLLEGE. 



" Thoogb I mm very sniiible tbKt It la from long experiexca chiefly that we ue to expect the moit carlain tvIm 

 of ptaclloe, yet It I* withal Itt be remembered tbttt the Hkellcet method to enable na lo make the moit jadlc4oiia 

 obaemtioni, and to put iu apoa tbe matt probable meana of hnprovloE any art, ia to get tbe beat iDslgbt we can 

 Into tbe nature and propertlea of thoae thing* which we sre devlrcna to cnltlTate and ImproTe."— Hafai'i VigtlaiUt 

 BtMtUn, 1. 87«. 



SECOND AMERICAN EDITION, WITH NOTES, etc. 



BY 



A. J. DOWNING. 



NEW YORK : 

 WILEY AND HALSTED, 



861 BEOADWAT 

 1859. 



