140 REPORT OF THE CHEMIST OF THE 
(8) Fixed acids—The amount of fixed acids, calculated as 
malic acid, varied from 0.41 to 0.66 per cent. and averaged 0.53 
per cent. 
(9) Volatile acids were practically absent. 
(10) Variations in composition.—It is noticeable that the com- 
position of apple juice varies considerably. The extent of such 
variation is still more striking, if we study analyses of apple juice 
made elsewhere. In Table II, we give the results of analysis of 
apple juice obtained by others from different varieties of Ameri- 
can apples. The results presented in the following table are from 
work done by C. A. Browne, Jr.,’ at the Pennsylvania State 
Agricultural Experiment Station; by J. S. Burd? of the Division 
of Chemistry, United States Department of Agriculture; and by 
R. J. Davidson,® of the Virginia Agricultural Experiment Sta- 
tion. There is also presented for comparison a summary showing 
the average composition of apple juice investigated by the differ- 
ent workers. 
“ 1Annual Report of the Pennsylvania State College for 1901-1902, p. 120. 
2Bulletin No. 136 of the Virginia Agricultural Experiment Station (1902). 
2Bulletin No. 136 and 143 of the Virginia Agricultural Experiment Station, 
pp. 94-95 (1902). 
