Page:Foods and their adulteration; origin, manufacture, and composition of food products; description of common adulterations, food standards, and national food laws and regulations (IA foodstheiradulte02wile).pdf/373

 The preceding analyses are evidently of grapes for table use. The juice of the wine-making grapes of California, according to the composition of the wine, contains about 24 percent of sugars.

The luxurious growth of the vine in California is illustrated by Fig. 49, showing a scene in a vineyard near Fresno, California.

—(Photograph by H. W. Wiley.)

Peaches.—One of the most valued orchard fruits in the United States is the peach. The peach is a tree which is particularly sensitive to the environment in respect of bearing a crop. In many localities where peaches have once been valuable they have ceased to produce with any regularity, which renders the planting of an orchard inadvisable. The principal danger in the peach tree is the too early blooming and the exposure of the tender fruit to late frosts. The peach tree is also subject to many forms of disease, one of which, namely, the yellows, has baffled up to the present time the efforts of the experts to diagnose and treat. In planting a peach orchard experience has shown that it is well to plant the trees upon high ground or upon the sides of hills. By being placed on high ground near deep ravines it has been found that the chilling of the air, which would naturally