It might be said here that the aviation gas bomb will be highly efficient, inasmuch as it has to be only strong enough to withstand the low pressure of the gas and ordinary handling, whereas artillery shell must be strong enough to withstand the shock of discharge in the gun. INFANTRY AND GAS WARFARE When one suggests the possibility of the infantry handling gas, it is at once argued that the infantry is already overloaded. That is true, but in the future, as in the past, the infantryman will increase or decrease his load of a given material just as its efficiency warrants. If he finds that gas will get casualties and help him win victories more readily than an equal weight of any other material, he will carry gas material. A study of the articles of equipment abandoned by 10,000 stragglers in the British Army picked up during the great German drive towards Amiens in March, 1918, illustrates this very clearly. Of the equipment carried by these stragglers, more than 6,000 had discarded their rifles. The helmets were thrown away to a somewhat less extent, but the gas mask had been thrown away by only 800 out of the 10,000. Now the gas mask is not a particularly easy thing to carry, nor was the English type comfortable to wear, but the English soldier had learned that in a gas attack he had no chance whatever of escape if his gas mask failed him. Accordingly, he hung on to the mask when he had discarded nearly everything else in his possession. The same thing will be true of any gas equipment if it proves its worth. SMOKE AND INCENDIARY MATERIALS So far nothing has been said in regard to smoke or incendiary materials. This has been due to the fact that their use is not dependent upon weather conditions to anything near the extent that gas is. Second, the smokes, not being poisonous, are not a danger to our own troops, although they may hamper movements and add to the difficulty of taking a position, if used improperly. Of the two classes of materials, smoke and incendiary, smoke materials may be said to be at least a thousand times as important as the incendiary materials. A material that will burst into flame when a shell is opened or that will scatter balls of burning fire appeals to the popular imagination, and yet actual results achieved by such materials on the field of battle have been almost nil. About the only results worth while achieved by incendiary materials have been in occasionally firing ammunition dumps and more frequently, setting fire to warehouses and other storage places. This will undoubtedly continue in the future. FLAME THROWER