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A Stoneless Prune

This shows one of Mr. Burbank's most remarkable productions, the stoneless prune, called the Conquest. A very tedious series of experiments was necessary to produce a fruit retaining the essential qualities of the prune. Mr. Burbank has finally accomplished this by hybridizing experiments in which his stoneless plums were crossed with improved descendants of the French prune. This is obviously the prune of the future.

A Stoneless Prune

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 2 Chapter 8