CONTENTS. 



Department Bulletin No. 376. — The Flow op Water in Wood-stave Pipe. page. 



Introduction ; 1 



Nomenclature 3 



Formulas for flow of water in wood-stave pipe 4 



Trend of engineering thought regarding the carrying capacity of wood- 

 stave pipes 7 



Necessary field data for determination of retarding elements of various 



formulas 14 



Equipment and methods employed for collecting and interpreting field 



data 16 



Elements of field tests to determine friction losses and comparison of 



observed velocities with velocities computed from various formulas 26 



Description of pipes 40 



A new set of formulas for the flow of water in wood-stave pipe 48 



Comparison of the various formulas 55 



Kutter's formula as applied to wood-stave pipe 56 



Effect of age upon the carrjdng capacity of wood-stave pipe 58 



Capacity of wood-stave pipes 58 



Estimate diagrams and table 66 



Capacity of wood-stave pipe compared with that of cast iron and riveted 



steel 72 



Conclusions 73 



Acknowledgments 74 



Appendix 74 



Discussion 81 



Department Bulletin No., 377. — ^Thb Argentine Ant: Distribution and 

 Control in the United States. 



Present known distribution in the Southern States 2 



Dispersion 3 



Economic importance 5 



Habits 6 



Life history 7 



Natural control 9 



Repression 10 



Department Bulletin No. 378. — Fish Meal: Its use as a Stock and Poul- 

 try Food. 



Introduction 1 



Review of literature 3 



Composition and qualities of fish meal 9 



Feeding experiments 11 



General methods for the maniifactiu'e of fish meal 16 



Opinions of the trade in regard to feeding fish meal 18 



Raw material available for fish meal 19 



General conclusions 20 



3 



