Have we any chestnuts which show immunity to this disease? The American chestnut is subject to it in its most virulent form. There are of course a number of varieties of the American chestnut which have been cultivated. Of these the two which I have seen most of are the Hathaway and the Spineless. Both of these are subject to the disease in the ordinary form. The American varieties which have been originated within a few years, the Boone and the Rochester, I am not prepared to say anything about at the present time. The resistance or immunity of these varieties has not been determined so far as my own work is concerned. Of the European varieties we have a great many and they produce, as a rule, the large chestnuts of the market and are known under various names. Some are scions of named varieties and I will mention some of the more prominent. The first and best known, perhaps, is the Paragon chestnut. This is susceptible to the disease and takes it in almost as violent a form as does the American, and so it is with the Ridgely, a nut which originated near Dover, Delaware. The Dager and the Scott also take the disease, and so do many of the so-called French varieties--the Marron, the Marron Combale, the Early Marron and others--so far as I have been able to ascertain. I have not seen very many Numbo trees, but of those which I have seen, some have been diseased. Two varieties, which I have seen have not had any disease upon them. One of these I saw only once or twice and was unable to make a thorough examination. This is the Darlington chestnut which grows near West Chester, Pa. I have no reason to think this is immune in any way to the disease; all I can say is that I have not yet seen the disease on this variety. Another variety which I have heard a great deal about from the point of view of resisting the disease is the Hannum. I don't know anything about this. I have been unable to locate any trees which I could examine. Now these are all the varieties of the European or American sorts that I care to speak about, and we can say that they are all, so far as we know, with the possible exception of the one or two last mentioned, subject to the disease.