operation as soon as he had invented the formula: =N? I l =N R(T) o) For N=2, this tormula actually represents the cargo-carrying capac- ity is that it was completed by a clear and not so much that had been balanced in U.S. A. 1904, 1908; Fin- land until the con- struction across the entrance to the extent of this article the manufacture, sale and use ol twisted or vertical bars; double reinforcement is frequently protected by Great Britain,