GradeAlarge eggs had the lowest average solids content (25.6%) of the grades studied and GradeCeggs had the highest (26.6%). The solids content increased during the period from December 1944 to July 1945. The total increase during this interval was about 0.5%.The average potassium chloride value of powder produced from GradesBandCeggs was higher than the value for GradeAmedium eggs; Graded medium and pullet eggs produced powder better in this quality attribute than GradeAlarge (differences of about 2%). The use of GradeCeggs resulted in a powder with an average fluorescence value about 2 units greater than for powder from any other grade of eggs. The month of egg production affected quality measures on the resulting powder. As the season progressed there was a decrease in the fluorescence value and pH and an increase in potassium chloride value and foaming volume value.The changes noted could not be attributed to climatic conditions, but may be attributable to feeding practices and to increased age of the hen.