Harvest (wine) of wine, winemakers would use the sugar and acid levels of the grape as a guide in determining ripeness. Early winemakers tasted the grapes to gauge ripeness. Modern winemakers use a refractometer to measure high sugar levels and °Brix or titration tests (using an indicator such as phenolphthalein) to determine the titratable acidity within the grape. In recent times there has been more of an emphasis on the "physiological" ripeness of the grape, usually in the form of tannins and other phenolics. Currently, tasting is the only way to measure tannin ripeness, which can take experience and skill to do
The Fox and the Grapes for some forty years and were imitated by other factories in France and abroad, being used not just as wall hangings but for chair covers and other domestic purposes. Furniture craftsmen in France also used the fables as themes and took these with them when they emigrated. Among them was Martin Jugiez (d.1815), who had a workshop in the American city of Philadelphia where the still surviving Fox and Grapes chest of drawers was produced. The Sèvres porcelain works used the fables on their china as well as reproducing Pierre's Julien's statue from a preliminary model in 1784, even before