Show A ventilation test it Is very hard to make an imbres slon sion on those people who defend their possessions on all occasions A lady was explaining to a visitor the many advantages 0 of concrete hollow block construction of which the walls of her new home were built the air spa cesin the wal afford insulation against heat in summer and cold in winter she explained be sides such alls afford ventilation and insure a more healthful bouse house the visitor reflected a moment and replied our frame house must be quite as well built every night we lock the cat in the cellar and have to let her out of the attic in the morning youth s companion |