This section is from the book "The Wonder Book Of Knowledge", by Henry Chase. Also available from Amazon: Wonder Book of Knowledge.
The accompanying illustrations show some remarkable white blackberries which have been developed by the great horticulturist, Luther Burbank of California. They grow thickly, are large in size and the taste is similar to that of the ordinary variety. Some spineless cactus in fruit are also shown. They make an excellent cattle food.
He has also originated a new fruit, the plumcot, by combining the plum and the apricot; developed very excellent varieties of potatoes and cherries; and produced various new apples and stoneless prunes as well as new peaches, nuts, roses, callas, violet-odored lilies and many other new varieties.
The son of a Massachusetts farmer, he became deeply interested in plant life and engaged in experiments on hybridization of plants. Removing to California, he established the Burbank Exposition Farms at Santa Rosa, where he undertook the work of cross-breeding on an extended scale. In 1905 the Carnegie Institute granted him $10,000 yearly for ten years to continue his work. He has very many extensive experiments under way and has nearly 3,000 distinct botanical specimens in his plantation.
 
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