It's World Toilet Day, dear readers, when the issue of global potty parity comes to the fore. This drawing, a detail from US Patent 2,220,482, shows Buckminster Fuller's 1938 design for a prefabricated bathroom. Bucky wasn't solely interested in architectural efficiency, though; he paid particular attention to the toilet component. His design was waterless, and contrived to shrink-wrap, err, 'deposits', for subsequent composting. Today the cause is carried forward by forces large [American Standard] and small [Loowatt] alike.