8 DEPARTMENT OF AGEICULTUEE BULS. 801-825. 



Department Bulletin No. 816. — Street Trees: 



. Importance of shade trees 



Public control of street trees 



Planning for trees on city streets 



Spacing trees 



Conditions for tree growth 



Kinds of trees suitable for city streets 



Qualities necessary 



Trees for different regions 



Trees for special purposes 



Descriptions of street trees 



Culture of street trees 



Selection of individual trees. 



Preparation of holes 



Planting 



Pruning 



Stakes and guards 



Later care '. 



Care of mature trees 



Pruning 



Feeding 



Spraying _ 



Publications relating to diseases and insects affecting shade and ornamental 

 trees 



Department Bulletin No. 817. — Observations on the Life History of 

 ascaris lumbricoides: 



Historial summary , 



Probable identity of Ascaris lumbricoides and Ascaris suum 



Egg stage of Ascaris 



Larval stages of Ascaris 



Relation of age to Ascaris infestation 



Ascaris pneumonia 



Longevity of larvae outside of the host 



Natural occurrence of Ascaris in sheep 



Life history of related nematodes , 



Details' of experiments with Ascaris 



General summary 



Bibliography 



Department Bulletin No. 818. — Soil Disinfection With Hot Water to 

 Control the Root-knot Nematode and Parasitic Soil Fungi: 



Objects of the investigations 



Experiment Series I 



Method of procedure 



Results 



Discussion of results - 



Experiment Series II 



Method of procedure 



Results - 



Discussion of results 



Summary 



Department Bulletin No. 819. — A Pink Yeast Causing Spoilage in 

 Oysters: 



Purpose of investigations - 



Historical review 



Distribution of the pink yeast 



In and about the oyster house 



In oysters - 



In water 



In mud 



Experimental production of pink color in oysters 



Morphology of the pink yeast 



Culture features of the pink yeast 



Biochemical features of the pink yeast - 



