It is well known that all glass now (both in portable sashes and in fixed greenhouses), is simply imbedded in putty, and kept in place by glazier's points, no putty being now used on top, as was formerly done. It has been found that when the glass lays on the sash-bar thus imbedded the putty soon rots or wears out, and water gets in and not only loosens the glass but rots the bar as well. A most simple plan to obviate this is to pour along the junction of the bar with the glass a thin line of white lead in oil, over which is shaken dry white sand. This hardens and makes a cement that effectually checks all leakage. It is quickly done.

I have seen glass, so cemented, that has stood for ten years, still in perfect order, and it looked as if it would stand for ten years more without further repair. This plan, which is but little known as yet, is of the greatest importance; had I known of it thirty years ago I would have saved many thousands of dollars in repairing, besides having the plants under this water-tight glazing in better condition. - Peter Henderson, in American Agriculturist.