Unfortunately, the perfidy of the enemy has made necessary another addition to the equipment of every soldier, and that is the gas mask. The best kind consists of heavy khaki cloth, kept wet with a solution to counteract and neutralise the chlorine in the gas, and equipped with goggles very much like what motorists wear, and a tube that enters the mouth. The air to be breathed is drawn in through the cloth itself, and the air that has been used is driven out through the tube. It is not a comfortable process but it is considerably better than imbibing deadly gas. Of course a water bottle must be carried and must always be kept clean. On every possible occasion the soldier should wash it out with hot water and some form of disinfectant. Men should be discouraged from rushing to their water bottles for drinks at all times, especially when they are on the march. Thirst is a thing that we can easily control if we will. We learnt that it was an excellent practice to have strapped about the equipment in a place where they could easily be got at, two sandbags. They are not heavy or bulky to carry, and if hasty cover is needed they will be found invaluable. Lists of the clothes necessary are given in every military manual, and it will be well to follow the one for the special army to which you belong. Besides, the clothing necessary will vary according to the climate in which the troops have to serve. Quite obviously the equipment for the Philippines will be different from the equipment for France. But we found that it was a good plan to have warm underclothes for the winter, not the heaviest variety, but reasonably heavy. It is better and more convenient to add to the clothing should occasion warrant it rather than carry heavy underclothes all the time. In summer the underclothing should be light. But whatever the season, a change should be carried in the pack on the back. In the case of socks two or three emergency pairs should be in the pack. These socks should be made of wool, preferably undyed, and should be thick and heavy for all times. I am aware that it is much nicer to have thin silk socks for the summer time, but they are not intended for marching in nor yet for use with heavy military boots. Two pairs of boots should be taken, one pair on the feet and one pair in the pack. Tennis shoes should also be carried to put on at times to rest the feet. I need scarcely indicate what toilet articles are needed, for they are the same on service as would be taken for a week-end at the seaside. But I would add that it is a good thing to include a cake of strong carbolic soap to discourage the lice. Emergency bandages, sewn into the tunic, may be the means of saving your life.