Building wall and tapered interfitting blocks therefor

Claim 1

IN A BUILDING WALL: (A) A PLURALITY OF FIRST AND SECOND TYPES OF BLOCKS ARRANGED IN SUPERIMPOSED ROWS, (B) THE FIRST AND SECOND TYPES OF BLOCKS EACH HAVING AN INVERTED SUBSTANTIALLY W-SHAPED UPPER SIDE FORMING A PAIR OF LONGITUDINAL TOP RIBS WITH A CORRESPONDING LONGITUDINAL TOP GROOVE THEREBETWEEN. (C) AN INVERTED SUBSTANTIALLY W-SHAPED LOWER SIDE FORMING A PAIR OF LONGITUDINAL BOTTOM GROOVES WITH A BOTTOM RIB THEREBETWEEN, AND (D) SUBSTANTIALLY W-SHAPED ENDS TAPERED FROM ONE OF SAID SIDES TO THE OTHER, EACH END OF EACH FIRST TYPE BLOCK HAVING A PAIR OF END GROOVES WITH AN END RIB THEREBETWEEN, THE END GROOVES EXTENDING BETWEEN THE TOP RIBS AND BOTTOM GROOVES AND THE END RIB EXTENDING BETWEEN THE TOP GROOVE AND BOTTOM RIB, (E) EACH BLOCK OF THE SECOND TYPE HAVING SUBSTANTIALLY W-SHAPED ENDS TAPERED FROM ONE SIDE TO THE OTHER SIDE, OPPOSITE TO THE TAPER OF THE FIRST TYPE BLOCK, EACH END OF EACH SECOND TYPE BLOCK HAVING A PAIR OF END RIBS WITH AN END GROOVE THEREBETWEEN, THE END RIBS EXTENDING BETWEEN THE TOP RIBS AND BOTTOM GROOVES AND THE END GROOVE EXTENDING BETWEEN THE TOP GROOVE AND BOTTOM RIB, (F) THE TWO TYPES OF BLOCKS BEING ALTERNATELY DISPOSED IN END-TO-END RELATION IN EACH ROW WITH THE TAPERS RESERVED, 7G) EACH TYPE OF BLOCK HAVING ITS BOTTOM GROOVES RECEIVING AND ITS BOTTOM RIB INTERFITTING RESPECTIVELY THE TOP RIBS AND THE TOP GROOVE OF THE SUBJACENT BLOCK OF THE SAME TYPE, AND HAVING ITS W-SHAPED ENDS INTERFITTING THE W-SHAPED ENDS OF LATERALLY ADJACENT BLOCKS OF THE OTHER TYPE OF THE SAME ROW.