Continued studies of the relationship of specific gravity to total solids of potatoes

The reliability of specific gravity as a measure of total solids was studied statistically. Studies on an expanded number of currently popular American potato samples indicated that differences were great enough that the accepted Von Scheele regression curve now borders on the obsolete. Variations in the relationship caused by lack of uniformity in analytical techniques, as well as inherent variations in the potatoes themselves indicated that a linear regression curve based on American potato varieties is sorely needed. It is suggested that such a curve be obtained through cooperative effort sponsored by the American Potato Association.