COMPOSITION OF UNFERMENTED GRAPE JUICE.
Reading edition
Herewith are given the component parts of a California and a Concord unfermented grape juice, the former being analyzed by the California Experiment Station, the latter by the Bureau of Chemistry, United States Department of Agriculture:
Concord. California.
Per cent. Per cent.
Solid contents 20.37 20.60
Total acids (as tartaric) .663 .53
Volatile acids .023 .03
Grape sugar 18.54 19.15
Free tartaric acids .025 .07
Ash .255 .19
Phosphoric acids .027 .04
Cream of tartar .55 .59
This table is interesting in so far that California unfermented grape juices are made from Viniferas or foreign varieties, whereas the Concord is a Labruska or one of our American sorts. The difference in taste and smell is even more pronounced than the analysis would indicate.