20/03/2010Vita ed energia dal Sole
Arc_Nebbia_Solare_30_105_12
30.105 J.W. Bloemer J.A. Eibling J.R. Irwin, Design of a basin-type solar still, (Battelle Memorial Institute, Columbus, Ohio, 19 may 1964). Step 12: Cap of 8 by 8 by 8-inch blocks for support of upper glass set in place with grout.