C. W. S. UNIQUE DUTIES—'’Continued from Page One)0000(T000005100amazing new techniques of strategic hocus-pocus and leg-erdemiftn.”By throwirfj' a layer of smoke over an open field CWS experts can creute the illusion of an actual lake. The effect is to confuse fliers overhead who are looking for landmarks to spot their objectives.Smoke generators in the hands of CWS soldiers create the illusion iv smoke timing9obscuration to the second with attack and maneuver. Chemicals used in this wav.” says Muj. Gen. William N. Porter, chief of the Chemical Warfare Service, are the armor of today.”Especially effective in the Normandy invasion were the floating smoke pots developed by CWS. They were thrown into the water and sent, up clouds of smoke to protecttroop movements in the water and hide shore installations. They were also used in North Africa, Sicily and Altu.What nobody can see, nobody can bomb or shell with precision. That has become an Army maxim. The. R.A.E. found it out. when trying to.ikS.U\Q^horst and Gneisonau in the•harbor at Brest. For many ■\ day British airmen dropped iheii missiles hopefully toward these valuable targets. Those cruisers escaped. One reason they got away was the German's use of protective smoko screen all around them—a screen now antiquated as compared with America’s latest inventions for the purpose.[IkI(n*