"In about ten days the bandage may come off, for the knitting of fibres is well under way. Now the top of the little tree should be cut right back to about two inches above the bud, because you wish all the growth to go to the bud. This is the part of promise to the tree. All its hope lies in this new bud. "The best method of increase is that of grafting. A graft or scion, which is a shoot with two or more buds on it of last year's growth, is inserted on the stem of another plant called the stock. "By means of this process of grafting, trees bearing poor fruit are made to bear good fruit. Wild fruit trees are brought under cultivation, and a given tree may bear several varieties of its given fruit. For example, I have in mind a tree, the marvel of my childhood, which bore big sour apples, beautiful Gravensteins, and a good quality of Baldwins. This sort of experimenting with trees is not only as good as a puzzle, but is of great value. To make a wild apple tree with its gnarly, little sour apples into a really truly, well-behaved tree bearing good fruit is worth while, is it not? Grafting is not only a method of improvement but of taming stock, which is after all improvement. "There are certain necessary precautions to take in this operation of grafting; for this, like budding, is a surgical operation. "In all woody branches the outer layer is the bark; next comes the green layer. Between this layer and the real wood is a mass of fibres which go by the name of 'cambium'. The cambium layer of the stock and the scion must be one against the other in grafting in order that the sap may flow freely as before. This layer of cambium might be likened to our blood system. The two cambium layers must be pressed closely together so that the operation may be successful. And finally no cut surface should be left exposed to the air. It is air, you know, that plays havoc with flesh wounds. More and more we see that tree doctors have a work something like our own physicians. "Grafting is usually done in the spring--in March or April--about the time sap begins to flow. The grafts or scions may be cut before this. Choose the tree from which you wish to take a scion. You choose it because of its fine-flavoured, sound fruit. Perhaps the fruit is especially large, too. Size of fruit, however, does not denote fine fruit. I once had an apple that weighed a pound. It was a beauty, fair to look upon. But what a tasteless, pithy piece of fruit it was. Appearances in fruit are often deceitful. The scions were to be of the last year's growth with two or more buds. The shoots should be clean, healthy and vigorous. You must transmit no disease along with the scions. These may be cut off in January or February, and stuck into the soil for about four to six inches. Keep away from direct sunlight. The buds of scions cut at this time are dormant as they should be.