With your permission I venture to take part in the discussion relating to the glazing of plant houses. Several years ago a severe hail storm demolished the roofs of a number of houses then in my charge, and with a view to saving from the wreck all that was possible, the work of re-covering with glass was pushed with vigor. The progress was so slow, however, in consequence of digging out the old putty, etc., that the loss from exposure was greater than from the hail and broken glass combined. A short time after that occurrence two forcing houses were constructed under my supervision, and the disaster being fresh in mind the following plan of glazing was adopted :

Instead of the stiles being rabbeted for puttying in the usual manner, they were grooved just wide enough and deep enough to permit the glass to slide easily but not too loosely. The panes (to which a little thick white lead was applied to the upper edges) were fed successively into the grooves from the lower edge of the roof, and the only fastening found necessary was one or two copper tacks at the foot of the last pane in each row of glass. Space for expansion was left at the top, and although breakages were few during the remainder of my charge, repairs were easily and rapidly made and without having to mount the roof. Little difference as to escape of heat was noticed at the time, but I am under the impression that a careful test would result in favor of the grooving system. Green Cove Springs, Fla.