Building blocks

A building construction comprised of blocks of substantially rectangular prismatic configuration wherein the first pair of opposite edges of each block are each formed with a first tongue and a first groove of complementary configuration extending in parallel relationship along each edge wherein the first tongue of one edge is opposite the first groove of the other edge, each of said first pair of edges being formed with a land portion extending between sides of said edge and the adjacent first tongue or groove, the height of said first tongue above said land portion being greater than the depth of the first groove below said land portion such that on a pair of blocks abutting whereby the first tongue of one edge is snugly received within the first groove of the other edge of another block,, the opposing land portions of the blocks are spaced from each other and a gap is formed between said land portions outwardly of said first tongue and said groove, the second pair of edges being formed whereby one edge has a second tongue extending along its edge and the portion of the one edge to each side of the second tongue being formed with raised land portions, and the other edge of said second pair of edges is formed with a second groove of complementary configuration to said second tongue wherein the height of the second tongue above the land portions is equal to the depth of the second groove, and a bonding adhesive filling solely the gap between said land portions for affixing said blocks to each other.