6 



Annals of Horticulture. 



Predaceous Insects iog 



Phylloxera no 



Spraying Machinery 114 



Fungicides 115 



Grape scare 116 



Peach-yellows and rosette 117 



Potato-rot 119 



$ 4. National and Educational Interests 125-158 



What is Horticulture ? 125 



The Columbian Exposition 130 



Government Aid to Horticulture 132 



Farmers' Institutes and University Extension 137 



Horticultural Societies - •. . 148 



New Colleges 152 



New York Botanic Garden . 153 



Legal Control of Varieties 155 



Nomenclature 155 



Other Discussions 156 



Effects of Fog upon Plants 157 



PART II. — Special Annals. 



1 1. Introductions of 1891 159-215 



\ 2. Census of Cultivated Indigenous Plants 216-275 



\ 3. Plant Portraits of 1891 276-305 



2 4. Directory of the National, State, Provincial 



and Other Most Important Horticultural So- 

 cieties in North America 306-311 



I 5. Directory of Horticulturists, or Those in 

 Charge of Horticultural Work, of Experi- 

 ment Stations in North America 312-314 



§ 6. The Botanic Gardens of the World 315-321 



$ 7. Title Index to Experiment Station Horticul- 

 tural Literature in North America for 1891 

 (including Publications of the Department of Ag- 

 riculture) 322-333 



I 8. Subject Index of Experiment Station Horticul- 

 tural Literature in North America for 1891 

 (including Publications of the Department of Ag- 

 riculture) 334-353 



I 9. Books of 1891 354~357 



I 10. Horticultural Periodicals of the World 358-361 



I 11. Tools and Conveniences of the Year 362-395 



I 12. Necrology of 1891 396-408 



