Vlll 



CONTENTS. 



Bulletin 169 — concluded. 

 Part II. — concluded. 



Problems of transportation, 



Shortage of cars, . 



Demurrage, .... 

 Prices of onions. 



Supply and demand. 



Varieties of onions handled, . 



Variations in the supply of onions. 



Variations in demand, . 



Wholesale prices of onions on Boston and New 



Prices to farmers. 



Distribution routes. 



Secondary distribution. 



The car-lot wholesaler, . 



Costs and profits, 



Jobber, 



Retailer, 



General spread of prices, 

 Recommendations, . 

 Summary, 



Bulletin 170. Shade trees, characteristics, adaptation 

 Introduction, ..... 

 Requirements of shade trees, 



Adaptability to climatic conditions, 



Hardiness and resistance. 



Configuration and conformity, 



Longevity, .... 



Rapidity of growth. 



Shade production. 



Root peculiarities or habits, . 



Neatness, .... 



^Esthetic value, 



SusceptibiUty to insect pests and diseases 



Commercial importance. 

 Street and roadside trees, . 

 What shall we plant? 

 Rapidity of growth of trees, 

 Streets and avenues. 

 Distance to plant. 

 Country roadsides, . 

 Root characteristics. 



Depth of roots. 



Obstruction of sewer tile, etc., by roots of trees 

 . Branching characteristics. 

 Soil conditions, texture, etc., 

 Soil covers, lawns, macadam, etc.. 

 Excavations, curbings and sidewalks, 

 Effects of light and shade, 

 Transplanting, 

 Tree surgery, . 



Pruning, 



Healing of wounds, 



Disinfectants for wounds and cavities. 



Chaining and bolting trees. 



York 



diseases and care 



markets, 



