CONTENTS. 



Department Bulletin No. 174. — Farm Experience with the Tractor — 

 Continued. 



Packing soil by tractors 27 



Comparison of different sizes of tractors 28 



Size of farm 30 



Use of tractors at night 33 



Custom work 34 



Repairs 35 



Displacement of horses by tractors 37 



Conditions essential to success with the tractor 39 



Summary 41 



Department Bulletin No. 175.— Mushrooms and Other Common Fungi: 



Introduction ■ 1 



Morphological structure of mushrooms and certain other fungi 3 



Descriptions of species 4 



Agaricaceae 5 



Polyporaceae 37 



Hydnaceae 43 



Tremellaceae 44 



Clavariaceae ! 46 



Gasteromycetes 47 



Ascomycetes 54 



Poisonous or suspected mushrooms 56 



Glossary 56 



Recipes for cooking mushrooms 58 



Reference books useful to the amateur 64 



