=Artillery Use of Gas.= Your Artillery will fire gas and smoke in every caliber of gun. There is a tendency now to limit gas to certain guns and howitzers and to limit smoke to even a smaller number of guns. This is a mistake that we are going to recognize. A very careful study of the records of the war show that more casualties were produced several times over by a thousand gas shells than by a thousand high explosive or shrapnel. And that is because gas has an inherent permanence that no other weapon of war has. =Permanency of Gas.= The bullet whistles through the air and does its work or misses. The high explosive shell bursts, hurling its fragments that in a few seconds settle to earth, and its work is done. The shrapnel acts in the same way, but when one turns loose a shell of gas it will kill and injure the same as the high explosive shell and in the same length of time and in addition for some minutes thereafter. Even with the non-persistent gases, it will continue on its way, causing death or injury to every unprotected animal, man or beast in its path. With the persistent gases, the materials from each shell may persist for days. =Variety of Uses of Gas.= This brings up the point of the great variety of uses to which gas can be put. The non-persistent gas may be used at all times where one wants to get rid of it in a few moments—the persistent gas wherever one wants to keep the enemy under gas for days at a time. We will use mustard gas on strong points in the advance, on flanks, on distant areas one will not expect to be reached, and as our own protection of masks and clothing increases toward perfection we will use it on the very fields you expect to cross. Why? Because we will be firing it at the enemy for days before hand and we will cause him trouble all those days while we ourselves will encounter it for a few hours at the most. So do not think that mustard gas is only going to be used in defense in the future. =Solid Mustard Gas and Long-Range Guns.= We will come to use chemical warfare materials just as high explosives and bullets are used today, even though at times we do suffer an occasional loss from our own weapons. Our Artillery in long-range guns where we want destruction will fill each shell with say 15 per cent gas and 85 per cent high explosive. We have a solid mustard gas that may be so used. We have tremendously powerful tear gases and irritating gases that may be so used. Being solids they do not affect the ballistic qualities of the shell. And what an added danger will mustard gas from every shell bring against railroad centers, rest villages, cantonments, cross-roads and the like. The results will be too great for any force to overlook such use.