CONTENTS. 



Department Bulletin No. 801. — Construction and Fire Protection of 



Cotton Warehouses: l-a^e. 



Primary factors in warehouse design 1 



Fire-resistive construction 16 



Slow-lnirning construction 41 



Semislow-burning construction 50 



Frame construction 57 



Iron-clad construction 57 



Auxiliary structures , 58 



Fire protective equipment 61 



Precautions against fire • 75 



Selection of warehouse design • 76 



Appendix. Standard warehouse plans 79 



Department Bulletin No. 802. — Quality and Value op important types 

 OP Peat Material: 



The present status of peat utilization 1 



Definitions and points of view in classifying peat materials 9 



A tentative classification of important types of peat materials 14 



The aquatic group of peat materials 14 



The marsh group of peat materials 23 



The bog group of peat materials 29 



The swamp group of peat materials 34 



Literature cited 39 



Department Bulletin No. 803. — ^A Chemical Study op the Ripening 

 and Pickling op California Olives: 



Olive culture in California , 1 



Varieties of the olive grown in California 2 



Olive-picking season , 3 



Changes in composition during ripening 3 



The pickling of olives 5 



Piurpose of investigation 7 



Plan of investigation 8 



Methods of examination 9 



Results of examination of fresh olives 13 



Results of examination of pickled olives 19 



Summary 24 



Department Bulletin No. 804. — A Study of the Behavior op Bees in 

 Colonies Affected by European Foul Brood: 



Introduction 1 



Procedure 5 



Observations 8 



^ Summary of previous experiments 15 



K Supplementary observations 17 



"' Study of naturally infected colonies 17 



Behavior of bees in cleaning contaminated cells 18 



Possible infection through queen 19 



Distribution of introduced infected material 20 



Age at which larvae are infected 21 



Microscopical bacteriological observations 24 



Summary and conclusions 26 



Literature cited 28 



3 



