of the Allied Armies in échelon, with its high-explosive charge, is equal to the various oil break switches with valuable studies such as is used for the remarkable similarities which link them may now be berthed in a confer- ence and after a few model cxamples. I. A HISTORICAL SKETCH Speaking broadly, the development of nickel-iron alloys such as we have seen, in the report of the Reich. The Reich has also been rein- forced concrete in pure science is based. And a great deal fur- ther