The apparatus of the invention includes {HEAD ~ a framework} which in {TAIL ~ the embodiment} of FIGS 1 and 2, is constructed of elongated, rigid rods of metal or plastic, including base members 10, upright members 12 and transverse members 14 
in
The apparatus of the invention includes { HEAD ~ a framework } which in { TAIL ~ the embodiment } of FIGS 1 and 2 , is constructed of elongated , rigid rods of metal or plastic , including base members 10 , upright members 12 and transverse members 14
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH