Too Free a Stone
Mr. Burbank has given great attention to the production of free-stone fruits, the advantages of which are obvious. This picture shows that such a fruit may not be without its disadvantages. Here is a prune, the flesh of which was so loosely attached to the stone that it broke away at too early a period, leaving a large cavity. Such fruit will obviously shrink very much in drying. The defect must be corrected by selective breeding before this particular prune has commercial value.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 2 Chapter 8