| abstract |
A floatable ball, a plurality of which floatable balls are for providing a gapless floating ball blanket, wherein the floatable ball includes a modified spheroid constructed of a floatable material and which modified spheroid is provided with a plurality of flat surfaces around the equator which flat surfaces provide the modified spheroid with an equatorial cross-section the outline of which is a closed plane figure comprised of interconnected straight lines equal in number to the plurality of flat surfaces, and a plurality of which floatable balls are engageable in flat surface-to-surface contact at the flat surfaces around the equators thereof to provide the gapless floating ball blanket. The floatable ball may further include means for absorbing and transferring radiant energy whereby the floatable ball can be utilized to heat liquid covered thereby. |