An inspection of the table of hickories show that 4 out of the 28 receiving 68 points or over, are certainly hybrids. There are a number of others where it seems very probable that they are hybrids. There are a number of facts to suggest that some of our very thin shelled hickories, which at first sight seem to be shagbarks, are hybrids of which the shellbark or mockernut is one parent. Why the offspring of such thick shelled nuts as the shellbark or the mockernut and the shagbark should be thin shelled, is more than I can imagine. We have two occurrences however which are significant. On the list of Japan walnuts two hybrids of the Persian and Japan walnut, Cording and Siebosian are noted. I have never tested a Persian walnut where the cracking pressure runs much over 40kg and it is rather unusual for a Japan walnut to run much over 200kg, yet Cording is 419kg, a strength of shell greater than that of any other nut sent into the contest this year and which is only found among black walnuts and shellbark hickories. Siebosian is not very much less. If two comparatively thin shelled nuts will produce an offspring with a shell so much thicker than either parent, it does not seem more impossible for two thick shelled nuts to produce thin shelled offsprings.