POTATO PIERCED BY GRASS .- A case of this is given in the GAZETTE for December. The past season I found two tubers in one hill pierced by stems of Poa pratensis. I mention this because some people still doubt that such a thing can take place. I have no doubt quick-grass is often carried from one farm to another where it has grown into potatoes. The growing point of the stems of quick-grass and June-grass are quite sharp and stout .- W. J. BEAL, Lansing, Mich.