REFERENCE KEY xix 



S-B Sevey, G. C. — Bean Culhire; The Orange Judd Company 



S-P Sevey, G. C. — Peas and Pea Culture; The Orange Judd Company 



Sp Spillman, W. J. — Farm Science; World Book Company 



SH Stevens, F. L., and Hall, J. G. — Diseases of Economic Plants; The 



Macmillan Company, 1921 



St Stimson, R. W. — Vocational Agricultural Education by Home Proj- 



ects; The Macmillan Company 



Tra Tracey, W. W. — Tomato Culture; The Orange Judd Company 



Trp Troop, J. — Melon Culture; The Orange Judd Company 



V Vivian, A. — First Principles of Soil Fertility; The Orange Judd 



Company 



W Watts, R. L. — Vegetable Growing Projects; this book 



W-VF Watts, R. L. — Vegetable Forcing; The Orange Judd Company 



W-VG Watts, R. L. — Vegetable Gardening; The Orange Judd Company 



Wi Wilkinson, A. E. — Sweet Com; The Orange Judd Company 



