DEPARTMENT OF AGRICULTURE BULS. 1051-1075. 



Department Bulletin No. 1073. — Some Changes in the Composition of 

 California Avocados During Growth — Continued. 



Discussion of results — Page. 



Composition of standard varieties tested 15 



Correlation between maturity and composition 16 



Conclusions 22 



Department Bulletin No. 1074. — Classification of American Wheat 

 Varieties: 



Necessity of 'classification of wheat 1 



Previous investigations 2 



Foreign classifications 3 



American classifications 7 



Summary of previous classifications 9 



Present investigations 10 



Classification nurseries 11 



Preparing descriptions, histories, and distributions 15 



Varietal nomenclature 17 



The wheat plant 22 



Morphological characters 23 



Physiological characters 47 



Classification of the genus Triticum 48 



Key to the species or subspecies 50 



Common wheat 50 



Club wheat 172 



Poulard wheat 180 



Durum wheat 183 



Emmer 193 



Spelt 195 



Polish wheat 197 



Einkorn 198 



Unidentified varieties 199 



Estimated acreage of varieties 207 



Literature cited 219 



Index to varieties and synonyms 231 



Department Bulletin No. 1075. — The Whipping Quality of Cream: 



Factors influencing whipping quality 1 



Experimental procedure 2 



Method of comparing stiffness of whipped cream 2 



Relation of various factors to whipping quality 3 



' ' Standing-up " quality of whipped cream 20 



Whipping quality of powdered cream 21 



Whipping quality of evaporated milk 21 



Summary 21 



