Abstract: A collapsible drawing table which also can be used as an easel, having a tabletop which can be inclined horizontally, vertically, or obliquely.In an alternate embodiment of the invention a separate easel body is provided for the assembly. The easel body can be skeletonized and can have vertically adjustable keeper and ledge means to allow the effective height of the easel to be varied without moving its frame.The invention is especially adapted for use by those who need both an easel and a tiltable folding table but have room for only one such appliance.

Abstract: A solar heat collector is formed by a unitary top plate having spaced apart downwardly extending tabs, a unitary bottom plate having spaced apart upwardly extending tabs, a frame holding the plates together in spaced apart relationship with the tabs intermeshed, and a backing plate held in the frame under the bottom plate. The upper surfaces of all plates and tabs are painted black to better absorb solar heat. Air is circulated between the heat collector and a porous heat storage unit to transfer heat from the collector to the storage unit, the tabs of the heat collector serving both as heat absorbent surfaces and as baffles to maximize heat transfer from the heat collector to the air stream. The tabs can be formed by making a plurality of H-shaped cuts in the top and bottom plates and then bending the inner margins of each H-shaped cut away from the plane of the corresponding plate to form two tabs.